Add Active Unlock tile under face & fingerprint

This tile will eventually link to GmsCore. It only shows up for non-work
profile face & fingerprint pages. Its visibility depends on both whether
the corresponding GmsCore component is enabled, as well as the feature
flag.

Test: make RunSettingsRoboTests
Test: manually flip flags, confirm tile shows in combined biometric page
Bug: 264813301
Change-Id: Ieea53f00e46cfbfe87e3b31756f64f299b7d3174

src/com/android/settings/biometrics/activeunlock/ActiveUnlockStatusPreferenceController.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2023 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.activeunlock;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.Utils;
+import com.android.settings.biometrics.BiometricStatusPreferenceController;
+import com.android.settingslib.RestrictedPreference;
+
+/**
+ * Preference controller for active unlock settings within the biometrics settings page, that
+ * controls the ability to unlock the phone with watch authentication.
+ */
+public class ActiveUnlockStatusPreferenceController
+        extends BiometricStatusPreferenceController implements LifecycleObserver {
+    /**
+     * Preference key.
+     *
+     * This must match the key found in security_settings_combined_biometric.xml
+     **/
+    public static final String KEY_ACTIVE_UNLOCK_SETTINGS = "biometric_active_unlock_settings";
+    @Nullable private RestrictedPreference mPreference;
+    @Nullable private PreferenceScreen mPreferenceScreen;
+    private final ActiveUnlockStatusUtils mActiveUnlockStatusUtils;
+
+    public ActiveUnlockStatusPreferenceController(@NonNull Context context) {
+        this(context, KEY_ACTIVE_UNLOCK_SETTINGS);
+    }
+
+    public ActiveUnlockStatusPreferenceController(
+            @NonNull Context context, @NonNull String key) {
+        super(context, key);
+        mActiveUnlockStatusUtils = new ActiveUnlockStatusUtils(context);
+    }
+
+    /** Resets the preference reference on resume. */
+    @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
+    public void onResume() {
+        if (mPreferenceScreen != null) {
+            displayPreference(mPreferenceScreen);
+        }
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreferenceScreen = screen;
+        mPreference = screen.findPreference(mPreferenceKey);
+        updateState(mPreference);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mActiveUnlockStatusUtils.getAvailability();
+    }
+
+    @Override
+    protected boolean isDeviceSupported() {
+        // This should never be called, as getAvailabilityStatus() will return the exact value.
+        // However, this is an abstract method in BiometricStatusPreferenceController, and so
+        // needs to be overridden.
+        return mActiveUnlockStatusUtils.isAvailable();
+    }
+
+    @Override
+    protected boolean isHardwareSupported() {
+        // This should never be called, as getAvailabilityStatus() will return the exact value.
+        // However, this is an abstract method in BiometricStatusPreferenceController, and so
+        // needs to be overridden.
+        return Utils.hasFaceHardware(mContext) || Utils.hasFingerprintHardware(mContext);
+    }
+
+    @Override
+    protected String getSummaryText() {
+        // TODO(b/264812018): set the summary from the ContentProvider
+        return "";
+    }
+
+    @Override
+    protected String getSettingsClassName() {
+        // TODO(b/264813445): direct user to face & fingerprint setup
+        return null;
+    }
+}