5/n: Add face settings

This change connects the face status preference controller with the
settings fragment/activity. This change also implements the basic settings
page showing a video, a toggle for keyguard, improve/remove targets,
and footer.

Bug: 111321762

Test: manual
Change-Id: Ifc65f5acbf6551679074df63ef22ffba75229f37

AndroidManifest.xml

@@ -425,6 +425,17 @@
                 android:value="com.android.settings.gestures.AssistGestureSettings" />
         </activity>
 
+        <activity android:name="Settings$FaceSettingsActivity"
+            android:label="@string/security_settings_face_preference_title"
+            android:icon="@drawable/ic_face_header">
+            <intent-filter>
+                <action android:name="android.settings.FACE_SETTINGS" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
+                android:value="com.android.settings.biometrics.face.FaceSettings" />
+        </activity>
+
         <activity android:name=".bluetooth.DevicePickerActivity"
                 android:label="@string/device_picker"
                 android:configChanges="orientation|keyboardHidden|screenSize"

res/layout/face_remove_button.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2018 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <Button
+        android:id="@+id/security_settings_face_settings_remove_button"
+        android:layout_marginStart="@dimen/screen_margin_sides"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="start"
+        android:text="@string/security_settings_face_settings_remove_face_data"/>
+
+</LinearLayout>

res/values/strings.xml

@@ -887,6 +887,17 @@
     <string name="security_settings_face_enroll_finish_title">All set. Looking good.</string>
     <!-- Button text to exit face wizard after everything is done [CHAR LIMIT=15] -->
     <string name="security_settings_face_enroll_done">Done</string>
+    <!-- Title for a category shown for the face settings page. [CHAR LIMIT=20] -->
+    <string name="security_settings_face_settings_use_face_category">Use your face to</string>
+    <!-- Text shown on a toggle which allows or disallows the device to use face for unlocking the device. [CHAR LIMIT=20] -->
+    <string name="security_settings_face_settings_use_face_unlock_phone">Unlock your device</string>
+    <!-- Button text in face settings which removes the user's faces from the device [CHAR LIMIT=20] -->
+    <string name="security_settings_face_settings_remove_face_data">Remove face data</string>
+    <!-- Text shown in face settings allowing the user to update/improve the enrolled face. This brings the user back to the enrollment flow. [CHAR LIMIT=30] -->
+    <string name="security_settings_face_settings_improve_face">Improve your face data</string>
+    <!-- Text shown in face settings explaining what your face can be used for. [CHAR LIMIT=NONE] -->
+    <string name="security_settings_face_settings_footer">Your face can be used to unlock your device and access apps.
+        <annotation id="url">Learn more</annotation></string>
 
     <!-- Fingerprint enrollment and settings --><skip />
     <!-- Title shown for menu item that launches fingerprint settings or enrollment [CHAR LIMIT=22] -->
@@ -6634,6 +6645,8 @@
     <string name="help_url_nfc_payment" translatable="false"></string>
     <!-- Help URL, Remote display [DO NOT TRANSLATE] -->
     <string name="help_url_remote_display" translatable="false"></string>
+    <!-- Help URL, Face [DO NOT TRANSLATE] -->
+    <string name="help_url_face" translatable="false"></string>
     <!-- Help URL, Fingerprint [DO NOT TRANSLATE] -->
     <string name="help_url_fingerprint" translatable="false"></string>
     <!-- Help URL, Gesture settings -->
@@ -6962,6 +6975,7 @@
     <string name="keywords_payment_settings">pay, tap, payments</string>
     <string name="keywords_backup">backup, back up</string>
     <string name="keywords_assist_gesture_launch">gesture</string>
+    <string name="keywords_face_unlock">face, unlock</string>
     <string name="keywords_imei_info">imei, meid, min, prl version, imei sv</string>
     <string name="keywords_sim_status">network, mobile network state, service state, signal strength, mobile network type, roaming, iccid</string>
     <string name="keywords_model_and_hardware">serial number, hardware version</string>

res/xml/security_settings_face.xml

@@ -0,0 +1,56 @@
+<!--
+  ~ Copyright (C) 2018 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:key="security_settings_face_settings_page"
+    android:title="@string/security_settings_face_preference_title">
+
+    <com.android.settings.widget.VideoPreference
+        android:key="security_settings_face_video"
+        app:animation="@raw/gesture_fingerprint_swipe"
+        app:preview="@drawable/face_enroll_introduction" />
+
+    <PreferenceCategory
+        android:key="security_settings_face_unlock_category"
+        android:title="@string/security_settings_face_settings_use_face_category">
+        <SwitchPreference
+            android:key="security_settings_face_unlock"
+            android:title="@string/security_settings_face_settings_use_face_unlock_phone"
+            app:keywords="@string/keywords_face_unlock"
+            app:controller="com.android.settings.biometrics.face.FaceSettingsUnlockPreferenceController"/>
+    </PreferenceCategory>
+
+    <PreferenceCategory
+        android:key="security_settings_face_manage_category">
+        <Preference
+            android:key="security_settings_face_improve"
+            android:title="@string/security_settings_face_settings_improve_face">
+        </Preference>
+
+        <com.android.settings.applications.LayoutPreference
+            android:key="security_settings_face_delete_faces_container"
+            android:selectable="false"
+            android:layout="@layout/face_remove_button" />
+    </PreferenceCategory>
+
+    <PreferenceCategory
+        android:key="security_settings_face_footer_container">
+        <com.android.settingslib.widget.FooterPreference />
+    </PreferenceCategory>
+
+</PreferenceScreen>

src/com/android/settings/Settings.java

@@ -31,6 +31,7 @@ public class Settings extends SettingsActivity {
     public static class AssistGestureSettingsActivity extends SettingsActivity { /* empty */}
     public static class BluetoothSettingsActivity extends SettingsActivity { /* empty */ }
     public static class CreateShortcutActivity extends SettingsActivity { /* empty */ }
+    public static class FaceSettingsActivity extends SettingsActivity { /* empty */ }
     public static class SimSettingsActivity extends SettingsActivity { /* empty */ }
     public static class TetherSettingsActivity extends SettingsActivity { /* empty */ }
     public static class WifiTetherSettingsActivity extends SettingsActivity { /* empty */ }

src/com/android/settings/biometrics/BiometricEnrollBase.java

@@ -16,6 +16,8 @@
 
 package com.android.settings.biometrics;
 
+import static android.app.Activity.RESULT_FIRST_USER;
+
 import android.annotation.Nullable;
 import android.content.Intent;
 import android.content.res.Resources;
@@ -39,11 +41,33 @@ import com.android.setupwizardlib.GlifLayout;
  */
 public abstract class BiometricEnrollBase extends InstrumentedActivity
         implements View.OnClickListener {
-    public static final int RESULT_FINISHED = BiometricSettings.RESULT_FINISHED;
-    public static final int RESULT_SKIP = BiometricSettings.RESULT_SKIP;
-    public static final int RESULT_TIMEOUT = BiometricSettings.RESULT_TIMEOUT;
     public static final String EXTRA_KEY_LAUNCHED_CONFIRM = "launched_confirm_lock";
 
+
+    /**
+     * Used by the choose fingerprint wizard to indicate the wizard is
+     * finished, and each activity in the wizard should finish.
+     * <p>
+     * Previously, each activity in the wizard would finish itself after
+     * starting the next activity. However, this leads to broken 'Back'
+     * behavior. So, now an activity does not finish itself until it gets this
+     * result.
+     */
+    public static final int RESULT_FINISHED = RESULT_FIRST_USER;
+
+    /**
+     * Used by the enrolling screen during setup wizard to skip over setting up fingerprint, which
+     * will be useful if the user accidentally entered this flow.
+     */
+    public static final int RESULT_SKIP = RESULT_FIRST_USER + 1;
+
+    /**
+     * Like {@link #RESULT_FINISHED} except this one indicates enrollment failed because the
+     * device was left idle. This is used to clear the credential token to require the user to
+     * re-enter their pin/pattern/password before continuing.
+     */
+    public static final int RESULT_TIMEOUT = RESULT_FIRST_USER + 2;
+
     public static final int CONFIRM_REQUEST = 1;
     public static final int ENROLLING = 2;
 

src/com/android/settings/biometrics/BiometricErrorDialog.java

@@ -16,8 +16,8 @@
 
 package com.android.settings.biometrics;
 
-import static com.android.settings.biometrics.BiometricSettings.RESULT_FINISHED;
-import static com.android.settings.biometrics.BiometricSettings.RESULT_TIMEOUT;
+import static com.android.settings.biometrics.BiometricEnrollBase.RESULT_FINISHED;
+import static com.android.settings.biometrics.BiometricEnrollBase.RESULT_TIMEOUT;
 
 import android.app.Activity;
 import android.app.Dialog;

src/com/android/settings/biometrics/BiometricSettings.java

@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License
- */
-
-package com.android.settings.biometrics;
-
-import com.android.settings.SubSettings;
-
-/**
- * Abstract base class for biometric settings, such as Fingerprint, Face, Iris
- */
-public abstract class BiometricSettings extends SubSettings {
-    /**
-     * Used by the choose fingerprint wizard to indicate the wizard is
-     * finished, and each activity in the wizard should finish.
-     * <p>
-     * Previously, each activity in the wizard would finish itself after
-     * starting the next activity. However, this leads to broken 'Back'
-     * behavior. So, now an activity does not finish itself until it gets this
-     * result.
-     */
-    protected static final int RESULT_FINISHED = RESULT_FIRST_USER;
-
-    /**
-     * Used by the enrolling screen during setup wizard to skip over setting up fingerprint, which
-     * will be useful if the user accidentally entered this flow.
-     */
-    protected static final int RESULT_SKIP = RESULT_FIRST_USER + 1;
-
-    /**
-     * Like {@link #RESULT_FINISHED} except this one indicates enrollment failed because the
-     * device was left idle. This is used to clear the credential token to require the user to
-     * re-enter their pin/pattern/password before continuing.
-     */
-    protected static final int RESULT_TIMEOUT = RESULT_FIRST_USER + 2;
-}

src/com/android/settings/biometrics/face/FaceSettings.java

@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.biometrics.face;
+
+import static com.android.settings.biometrics.BiometricEnrollBase.CONFIRM_REQUEST;
+
+import android.content.Context;
+import android.hardware.face.FaceManager;
+import android.os.Bundle;
+import android.provider.SearchIndexableResource;
+import android.util.Log;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.Utils;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.password.ChooseLockSettingsHelper;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.search.SearchIndexable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Settings screen for face authentication.
+ */
+@SearchIndexable
+public class FaceSettings extends DashboardFragment {
+
+    private static final String TAG = "FaceSettings";
+    private static final String KEY_LAUNCHED_CONFIRM = "key_launched_confirm";
+
+    private boolean mLaunchedConfirm;
+
+    public static boolean isAvailable(Context context) {
+        FaceManager manager = Utils.getFaceManagerOrNull(context);
+        return manager != null && manager.isHardwareDetected();
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.FACE;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.security_settings_face;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putBoolean(KEY_LAUNCHED_CONFIRM, mLaunchedConfirm);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (savedInstanceState != null) {
+            mLaunchedConfirm = savedInstanceState.getBoolean(KEY_LAUNCHED_CONFIRM, false);
+        }
+
+        if (!mLaunchedConfirm) {
+            ChooseLockSettingsHelper helper = new ChooseLockSettingsHelper(getActivity(), this);
+            if (!helper.launchConfirmationActivity(CONFIRM_REQUEST,
+                    getString(R.string.security_settings_face_preference_title))) {
+                Log.e(TAG, "Password not set");
+                finish();
+            }
+        }
+    }
+
+    @Override
+    protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
+        return buildPreferenceControllers(context, getSettingsLifecycle());
+    }
+
+    private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
+            Lifecycle lifecycle) {
+        final List<AbstractPreferenceController> controllers = new ArrayList<>();
+        controllers.add(new FaceSettingsVideoPreferenceController(context));
+        controllers.add(new FaceSettingsImprovePreferenceController(context));
+        controllers.add(new FaceSettingsUnlockPreferenceController(context));
+        controllers.add(new FaceSettingsRemoveButtonPreferenceController(context));
+        controllers.add(new FaceSettingsFooterPreferenceController(context));
+        return controllers;
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider() {
+                @Override
+                public List<SearchIndexableResource> getXmlResourcesToIndex(
+                        Context context, boolean enabled) {
+                    final SearchIndexableResource sir = new SearchIndexableResource(context);
+                    sir.xmlResId = R.xml.security_settings_face;
+                    return Arrays.asList(sir);
+                }
+
+                @Override
+                public List<AbstractPreferenceController> createPreferenceControllers(
+                        Context context) {
+                    return buildPreferenceControllers(context, null /* lifecycle */);
+                }
+
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    return isAvailable(context);
+                }
+            };
+
+}

src/com/android/settings/biometrics/face/FaceSettingsFooterPreferenceController.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.biometrics.face;
+
+import android.content.Context;
+import android.content.Intent;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.utils.AnnotationSpan;
+import com.android.settingslib.HelpUtils;
+import com.android.settingslib.widget.FooterPreference;
+
+import androidx.preference.Preference;
+
+/**
+ * Footer for face settings showing the help text and help link.
+ */
+public class FaceSettingsFooterPreferenceController extends BasePreferenceController {
+
+    private static final String ANNOTATION_URL = "url";
+
+    public FaceSettingsFooterPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    public FaceSettingsFooterPreferenceController(Context context) {
+        this(context, FooterPreference.KEY_FOOTER);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+
+        final Intent helpIntent = HelpUtils.getHelpIntent(
+                mContext, mContext.getString(R.string.help_url_face), getClass().getName());
+        final AnnotationSpan.LinkInfo linkInfo =
+                new AnnotationSpan.LinkInfo(mContext, ANNOTATION_URL, helpIntent);
+        preference.setTitle(AnnotationSpan.linkify(
+                mContext.getText(R.string.security_settings_face_settings_footer), linkInfo));
+    }
+}

src/com/android/settings/biometrics/face/FaceSettingsImprovePreferenceController.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.biometrics.face;
+
+import android.content.Context;
+
+import com.android.settings.core.BasePreferenceController;
+
+import androidx.preference.Preference;
+
+/**
+ * Preference controller which allows the user to update their enrolled face.
+ */
+public class FaceSettingsImprovePreferenceController extends BasePreferenceController {
+
+    private static final String KEY = "security_settings_face_improve";
+
+    public FaceSettingsImprovePreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    public FaceSettingsImprovePreferenceController(Context context) {
+        this(context, KEY);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+}

src/com/android/settings/biometrics/face/FaceSettingsRemoveButtonPreferenceController.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.biometrics.face;
+
+import android.content.Context;
+import android.view.View;
+import android.widget.Button;
+
+import com.android.settings.R;
+import com.android.settings.applications.LayoutPreference;
+import com.android.settings.core.BasePreferenceController;
+
+import androidx.preference.Preference;
+
+/**
+ * Controller for the remove button.
+ */
+public class FaceSettingsRemoveButtonPreferenceController extends BasePreferenceController
+        implements View.OnClickListener {
+
+    private static final String KEY = "security_settings_face_delete_faces_container";
+
+    private Button mButton;
+
+    public FaceSettingsRemoveButtonPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    public FaceSettingsRemoveButtonPreferenceController(Context context) {
+        this(context, KEY);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+
+        mButton = ((LayoutPreference) preference)
+                .findViewById(R.id.security_settings_face_settings_remove_button);
+        mButton.setOnClickListener(this);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY;
+    }
+
+    @Override
+    public void onClick(View v) {
+        if (v == mButton) {
+
+        }
+    }
+}

src/com/android/settings/biometrics/face/FaceSettingsUnlockPreferenceController.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.biometrics.face;
+
+import static android.provider.Settings.Secure.FACE_UNLOCK_KEYGUARD_ENABLED;
+
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+
+import com.android.settings.core.TogglePreferenceController;
+
+import androidx.preference.Preference;
+
+/**
+ * Preference controller for Face settings page controlling the ability to unlock the phone
+ * with face.
+ */
+public class FaceSettingsUnlockPreferenceController extends TogglePreferenceController {
+
+    private static final String KEY = "security_settings_face_unlock";
+
+    private static final int ON = 1;
+    private static final int OFF = 0;
+    private static final int DEFAULT = ON;  // face unlock is enabled on keyguard by default
+
+    public FaceSettingsUnlockPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    public FaceSettingsUnlockPreferenceController(Context context) {
+        this(context, KEY);
+    }
+
+    @Override
+    public boolean isChecked() {
+        if (!FaceSettings.isAvailable(mContext)) {
+            return false;
+        } else if (adminDisabled()) {
+            return false;
+        }
+        return Settings.Secure.getInt(
+                mContext.getContentResolver(), FACE_UNLOCK_KEYGUARD_ENABLED, DEFAULT) == ON;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.Secure.putInt(mContext.getContentResolver(), FACE_UNLOCK_KEYGUARD_ENABLED,
+                isChecked ? ON : OFF);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        if (!FaceSettings.isAvailable(mContext)) {
+            preference.setEnabled(false);
+        } else if (adminDisabled()) {
+            preference.setEnabled(false);
+        } else {
+            preference.setEnabled(true);
+        }
+    }
+
+    private boolean adminDisabled() {
+        DevicePolicyManager dpm =
+                (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);
+        return dpm != null &&
+                (dpm.getKeyguardDisabledFeatures(null, UserHandle.myUserId())
+                        & DevicePolicyManager.KEYGUARD_DISABLE_FACE)
+                        != 0;
+    }
+}

src/com/android/settings/biometrics/face/FaceSettingsVideoPreferenceController.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.biometrics.face;
+
+import android.content.Context;
+
+import com.android.settings.core.BasePreferenceController;
+
+public class FaceSettingsVideoPreferenceController extends BasePreferenceController {
+
+    private static final String PREF_KEY_VIDEO = "security_settings_face_video";
+
+    public FaceSettingsVideoPreferenceController(Context context,
+            String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    public FaceSettingsVideoPreferenceController(Context context) {
+        this(context, PREF_KEY_VIDEO);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+}

src/com/android/settings/biometrics/face/FaceStatusPreferenceController.java

@@ -20,6 +20,7 @@ import android.content.Context;
 import android.hardware.face.FaceManager;
 
 import com.android.settings.R;
+import com.android.settings.Settings;
 import com.android.settings.Utils;
 import com.android.settings.biometrics.BiometricStatusPreferenceController;
 
@@ -62,7 +63,7 @@ public class FaceStatusPreferenceController extends BiometricStatusPreferenceCon
 
     @Override
     protected String getSettingsClassName() {
-        return null;
+        return Settings.FaceSettingsActivity.class.getName();
     }
 
     @Override

src/com/android/settings/biometrics/fingerprint/FingerprintSettings.java

@@ -40,8 +40,9 @@ import android.widget.Toast;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.SubSettings;
 import com.android.settings.Utils;
-import com.android.settings.biometrics.BiometricSettings;
+import com.android.settings.biometrics.BiometricEnrollBase;
 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
 import com.android.settings.password.ChooseLockGeneric;
 import com.android.settings.password.ChooseLockSettingsHelper;
@@ -66,7 +67,7 @@ import androidx.preference.PreferenceViewHolder;
 /**
  * Settings screen for fingerprints
  */
-public class FingerprintSettings extends BiometricSettings {
+public class FingerprintSettings extends SubSettings {
 
     private static final String TAG = "FingerprintSettings";
 
@@ -75,6 +76,10 @@ public class FingerprintSettings extends BiometricSettings {
     public static final String ANNOTATION_URL = "url";
     public static final String ANNOTATION_ADMIN_DETAILS = "admin_details";
 
+    private static final int RESULT_FINISHED = BiometricEnrollBase.RESULT_FINISHED;
+    private static final int RESULT_SKIP = BiometricEnrollBase.RESULT_SKIP;
+    private static final int RESULT_TIMEOUT = BiometricEnrollBase.RESULT_TIMEOUT;
+
     @Override
     public Intent getIntent() {
         Intent modIntent = new Intent(super.getIntent());

src/com/android/settings/core/gateway/SettingsGateway.java

@@ -52,6 +52,7 @@ import com.android.settings.applications.specialaccess.pictureinpicture.PictureI
 import com.android.settings.applications.specialaccess.vrlistener.VrListenerSettings;
 import com.android.settings.backup.PrivacySettings;
 import com.android.settings.backup.ToggleBackupSettingFragment;
+import com.android.settings.biometrics.face.FaceSettings;
 import com.android.settings.bluetooth.BluetoothDeviceDetailsFragment;
 import com.android.settings.connecteddevice.AdvancedConnectedDeviceDashboardFragment;
 import com.android.settings.connecteddevice.ConnectedDeviceDashboardFragment;
@@ -187,6 +188,7 @@ public class SettingsGateway {
             PowerUsageSummary.class.getName(),
             AccountSyncSettings.class.getName(),
             AssistGestureSettings.class.getName(),
+            FaceSettings.class.getName(),
             SwipeToNotificationSettings.class.getName(),
             DoubleTapPowerSettings.class.getName(),
             DoubleTapScreenSettings.class.getName(),