1/n Start adding Face settings (base, intro)

This change refactors common biometric settings code as well to minimize
duplicated code in areas such as:
    Preference Controller
    EnrollBase
    EnrollIntro

This change also updates ChooseLock to have Face + Pin/Pattern/Pass

Bug: 110589286

Test: Fingerprint settings/enrollment still works
Test: make -j56 RunSettingsRoboTests
Change-Id: Ie35406a01b85617423beece42683ac086e9bc4a7

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

@@ -0,0 +1,131 @@
+/*
+ * 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 android.content.Context;
+import android.content.Intent;
+import android.os.UserHandle;
+import android.os.UserManager;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.Utils;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.overlay.FeatureFactory;
+
+import androidx.preference.Preference;
+
+public abstract class BiometricStatusPreferenceController extends BasePreferenceController {
+
+    protected final UserManager mUm;
+    protected final LockPatternUtils mLockPatternUtils;
+
+    protected final int mUserId = UserHandle.myUserId();
+    protected final int mProfileChallengeUserId;
+
+    /**
+     * @return true if the manager is not null and the hardware is detected.
+     */
+    protected abstract boolean isDeviceSupported();
+
+    /**
+     * @return true if the user has enrolled biometrics of the subclassed type.
+     */
+    protected abstract boolean hasEnrolledBiometrics();
+
+    /**
+     * @return the summary text if biometrics are enrolled.
+     */
+    protected abstract String getSummaryTextEnrolled();
+
+    /**
+     * @return the summary text if no biometrics are enrolled.
+     */
+    protected abstract String getSummaryTextNoneEnrolled();
+
+    /**
+     * @return the class name for the settings page.
+     */
+    protected abstract String getSettingsClassName();
+
+    /**
+     * @return the class name for entry to enrollment.
+     */
+    protected abstract String getEnrollClassName();
+
+    public BiometricStatusPreferenceController(Context context, String key) {
+        super(context, key);
+        mUm = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mLockPatternUtils = FeatureFactory.getFactory(context)
+                .getSecurityFeatureProvider()
+                .getLockPatternUtils(context);
+        mProfileChallengeUserId = Utils.getManagedProfileId(mUm, mUserId);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (!isDeviceSupported()) {
+            return UNSUPPORTED_ON_DEVICE;
+        }
+        if (isUserSupported()) {
+            return AVAILABLE;
+        } else {
+            return DISABLED_FOR_USER;
+        }
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (!isAvailable()) {
+            if (preference != null) {
+                preference.setVisible(false);
+            }
+            return;
+        } else {
+            preference.setVisible(true);
+        }
+        final int userId = getUserId();
+        final String clazz;
+        if (hasEnrolledBiometrics()) {
+            preference.setSummary(getSummaryTextEnrolled());
+            clazz = getSettingsClassName();
+        } else {
+            preference.setSummary(getSummaryTextNoneEnrolled());
+            clazz = getEnrollClassName();
+        }
+        preference.setOnPreferenceClickListener(target -> {
+            final Context context = target.getContext();
+            final UserManager userManager = UserManager.get(context);
+            if (Utils.startQuietModeDialogIfNecessary(context, userManager,
+                    userId)) {
+                return false;
+            }
+            Intent intent = new Intent();
+            intent.setClassName("com.android.settings", clazz);
+            intent.putExtra(Intent.EXTRA_USER_ID, userId);
+            context.startActivity(intent);
+            return true;
+        });
+    }
+
+    protected int getUserId() {
+        return mUserId;
+    }
+
+    protected boolean isUserSupported() {
+        return true;
+    }
+}