Update FaceSettings to match mocks

Settings page should not show if device credential is not confirmed

Bug: 111548037
Fixes: 116531896

Test: adb shell settings get secure face_unlock_app_enabled
Test: make -j56 RunSettingsRoboTests

Change-Id: I651ee88e9ee4017ee3dc52fa8a5d05cb8f092e1d

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

@@ -0,0 +1,86 @@
+/*
+ * 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.hardware.face.FaceManager;
+import android.util.Log;
+
+import com.android.settings.core.TogglePreferenceController;
+
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+/**
+ * Preference controller that manages the ability to use face authentication with/without
+ * user attention. See {@link FaceManager#setRequireAttention(boolean, byte[])}.
+ */
+public class FaceSettingsAttentionPreferenceController extends TogglePreferenceController {
+
+    public static final String KEY = "security_settings_face_require_attention";
+
+    private byte[] mToken;
+    private FaceManager mFaceManager;
+    private SwitchPreference mPreference;
+
+    public FaceSettingsAttentionPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mFaceManager = context.getSystemService(FaceManager.class);
+    }
+
+    public FaceSettingsAttentionPreferenceController(Context context) {
+        this(context, KEY);
+    }
+
+    public void setToken(byte[] token) {
+        mToken = token;
+        mPreference.setChecked(mFaceManager.getRequireAttention(mToken));
+    }
+
+    /**
+     * Displays preference in this controller.
+     */
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = (SwitchPreference) screen.findPreference(KEY);
+    }
+
+    @Override
+    public boolean isChecked() {
+        if (!FaceSettings.isAvailable(mContext)) {
+            return true;
+        } else if (mToken == null) {
+            // The token will be null when the controller is first created, since CC has not been
+            // completed by the user. Once it's completed, FaceSettings will use setToken which
+            // will retrieve the correct value from FaceService
+            return true;
+        }
+        return mFaceManager.getRequireAttention(mToken);
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        mFaceManager.setRequireAttention(isChecked, mToken);
+        return true;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+}