Reland add FeatureProvider for SyncAcrossDevices Settings integration.

Prior CL ag/26930404 was reverted because an unused class was
trimmed in AOSP, causing test cases to throw NoClassDefFoundError
exceptions. This CL combines ag/26930404 and ag/26995936 to address
the failure.

Bug: 330498032
Test: atest FakeFeatureFactory, atest SyncAcrossDevicesPreferenceControllerTest
Change-Id: I0a7ebccdebcad20e06d7542d7c4a0005885f393b

res/values/strings.xml

@@ -13182,4 +13182,7 @@
 
     <!-- Provider Model: summary of converted in SIM category. [CHAR LIMIT=50] -->
     <string name="sim_category_converted_sim">Converted to eSIM. Remove and discard.</string>
+
+    <!--Title for Sync Across Devices category-->
+    <string name="sync_across_devices_title">Sync across devices</string>
 </resources>

res/xml/configure_notification_settings.xml

@@ -108,6 +108,11 @@
 
     </PreferenceCategory>
 
+    <PreferenceCategory
+        android:key="sync_across_devices"
+        android:title="@string/sync_across_devices_title"
+        settings:controller="com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesPreferenceController"/>
+
     <PreferenceCategory
         android:key="advanced_section_header"
         android:title="@string/advanced_section_header">

src/com/android/settings/notification/syncacrossdevices/SyncAcrossDevicesFeatureCallback.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2024 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.notification.syncacrossdevices;
+
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+
+/** Callback to add or remove {@link Preference} in Sync Across Devices feature. */
+public interface SyncAcrossDevicesFeatureCallback {
+
+    /**
+     * Called when a sync across devices feature is added
+     *
+     * @param preference present the feature
+     */
+    void onFeatureAdded(@Nullable Preference preference);
+
+    /**
+     * Called when a sync across devices feature is removed
+     *
+     * @param preference present the feature
+     */
+    void onFeatureRemoved(@Nullable Preference preference);
+}

src/com/android/settings/notification/syncacrossdevices/SyncAcrossDevicesFeatureProvider.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2024 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.notification.syncacrossdevices;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+/** Feature provider for the Sync Across Devices. */
+public interface SyncAcrossDevicesFeatureProvider {
+
+    /** Returns the SyncAcrossDevicesFeatureUpdater of the Sync Across Devices feature */
+    @Nullable
+    SyncAcrossDevicesFeatureUpdater getSyncAcrossDevicesFeatureUpdater(
+            @NonNull Context context,
+            @NonNull SyncAcrossDevicesFeatureCallback featurePreferenceCallback);
+}

src/com/android/settings/notification/syncacrossdevices/SyncAcrossDevicesFeatureProviderImpl.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2024 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.notification.syncacrossdevices;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+/** Default implementation for {@link SyncAcrossDevicesFeatureProvider} */
+public class SyncAcrossDevicesFeatureProviderImpl implements SyncAcrossDevicesFeatureProvider {
+
+    @Override
+    @Nullable
+    public SyncAcrossDevicesFeatureUpdater getSyncAcrossDevicesFeatureUpdater(
+            @NonNull Context context,
+            @NonNull SyncAcrossDevicesFeatureCallback featurePreferenceCallback) {
+        return new SyncAcrossDevicesFeatureUpdater() {};
+    }
+}

src/com/android/settings/notification/syncacrossdevices/SyncAcrossDevicesFeatureUpdater.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2024 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.notification.syncacrossdevices;
+
+import android.content.Context;
+
+import androidx.annotation.Nullable;
+
+/**
+ * Updates the sync across devices feature state. It notifies the upper level whether to add/remove
+ * the preference through {@link SyncAcrossDevicesFeatureCallback}
+ */
+public interface SyncAcrossDevicesFeatureUpdater {
+
+    /** Forces to update the list of the Sync Across Devices feature. */
+    default void forceUpdate() {}
+
+    /** Sets the context to generate the {@link Preference}, so it could get the correct theme. */
+    default void setPreferenceContext(@Nullable Context preferenceContext) {}
+}

src/com/android/settings/notification/syncacrossdevices/SyncAcrossDevicesPreferenceController.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2024 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.notification.syncacrossdevices;
+
+import android.content.Context;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settings.overlay.FeatureFactory;
+
+public class SyncAcrossDevicesPreferenceController extends BasePreferenceController
+        implements PreferenceControllerMixin, SyncAcrossDevicesFeatureCallback {
+
+    private static final String TAG = "SyncXDevicesPrefCtr";
+
+    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
+
+    private PreferenceGroup mPreferenceGroup;
+    private SyncAcrossDevicesFeatureUpdater mSyncAcrossDevicesFeatureUpdater;
+
+    public SyncAcrossDevicesPreferenceController(@NonNull Context context, @NonNull String key) {
+        super(context, key);
+        SyncAcrossDevicesFeatureProvider syncAcrossDevicesFeatureProvider =
+                FeatureFactory.getFeatureFactory().getSyncAcrossDevicesFeatureProvider();
+        mSyncAcrossDevicesFeatureUpdater =
+                syncAcrossDevicesFeatureProvider.getSyncAcrossDevicesFeatureUpdater(context, this);
+    }
+
+    @Override
+    public void displayPreference(@NonNull PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreferenceGroup = screen.findPreference(getPreferenceKey());
+        mPreferenceGroup.setVisible(false);
+        if (isAvailable()) {
+            final Context context = screen.getContext();
+            mSyncAcrossDevicesFeatureUpdater.setPreferenceContext(context);
+            mSyncAcrossDevicesFeatureUpdater.forceUpdate();
+        }
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mSyncAcrossDevicesFeatureUpdater != null ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public void onFeatureAdded(@Nullable Preference preference) {
+        if (preference == null) {
+            if (DEBUG) {
+                Log.d(TAG, "onFeatureAdded receives null preference. Ignore.");
+            }
+            return;
+        }
+        mPreferenceGroup.addPreference(preference);
+        updatePreferenceVisibility();
+    }
+
+    @Override
+    public void onFeatureRemoved(@Nullable Preference preference) {
+        if (preference == null) {
+            if (DEBUG) {
+                Log.d(TAG, "onFeatureRemoved receives null preference. Ignore.");
+            }
+            return;
+        }
+        mPreferenceGroup.removePreference(preference);
+        updatePreferenceVisibility();
+    }
+
+    private void updatePreferenceVisibility() {
+        mPreferenceGroup.setVisible(mPreferenceGroup.getPreferenceCount() > 0);
+    }
+
+    @VisibleForTesting
+    public void setPreferenceGroup(@NonNull PreferenceGroup preferenceGroup) {
+        mPreferenceGroup = preferenceGroup;
+    }
+}

src/com/android/settings/overlay/FeatureFactory.kt

@@ -38,6 +38,7 @@ import com.android.settings.fuelgauge.PowerUsageFeatureProvider
 import com.android.settings.homepage.contextualcards.ContextualCardFeatureProvider
 import com.android.settings.inputmethod.KeyboardSettingsFeatureProvider
 import com.android.settings.localepicker.LocaleFeatureProvider
+import com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesFeatureProvider
 import com.android.settings.onboarding.OnboardingFeatureProvider
 import com.android.settings.overlay.FeatureFactory.Companion.setFactory
 import com.android.settings.panel.PanelFeatureProvider
@@ -188,6 +189,11 @@ abstract class FeatureFactory {
      */
     abstract val audioSharingFeatureProvider: AudioSharingFeatureProvider
 
+    /**
+     * Gets implementation for sync across devices related feature.
+     */
+    abstract val syncAcrossDevicesFeatureProvider: SyncAcrossDevicesFeatureProvider
+
     companion object {
         private var _factory: FeatureFactory? = null
 

src/com/android/settings/overlay/FeatureFactoryImpl.kt

@@ -55,6 +55,8 @@ import com.android.settings.homepage.contextualcards.ContextualCardFeatureProvid
 import com.android.settings.inputmethod.KeyboardSettingsFeatureProvider
 import com.android.settings.inputmethod.KeyboardSettingsFeatureProviderImpl
 import com.android.settings.localepicker.LocaleFeatureProviderImpl
+import com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesFeatureProvider
+import com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesFeatureProviderImpl
 import com.android.settings.panel.PanelFeatureProviderImpl
 import com.android.settings.search.SearchFeatureProvider
 import com.android.settings.search.SearchFeatureProviderImpl
@@ -197,4 +199,8 @@ open class FeatureFactoryImpl : FeatureFactory() {
     override val audioSharingFeatureProvider: AudioSharingFeatureProvider by lazy {
         AudioSharingFeatureProviderImpl()
     }
+
+    override val syncAcrossDevicesFeatureProvider: SyncAcrossDevicesFeatureProvider by lazy {
+        SyncAcrossDevicesFeatureProviderImpl()
+    }
 }

tests/robotests/src/com/android/settings/notification/syncacrossdevices/SyncAcrossDevicesPreferenceControllerTest.java

@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2024 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.notification.syncacrossdevices;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceManager;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class SyncAcrossDevicesPreferenceControllerTest {
+
+    @Rule public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+
+    @Mock private SyncAcrossDevicesFeatureUpdater mSyncAcrossDevicesFeatureUpdater;
+    @Mock private PreferenceManager mPreferenceManager;
+
+    private static final String PREFERENCE_KEY = "preference_key";
+
+    private Context mContext;
+    private SyncAcrossDevicesPreferenceController mSyncAcrossDevicesPreferenceController;
+    private PreferenceGroup mPreferenceGroup;
+
+    @Before
+    public void setUp() {
+        mContext = spy(RuntimeEnvironment.application);
+        SyncAcrossDevicesFeatureProvider provider =
+                FakeFeatureFactory.setupForTest().getSyncAcrossDevicesFeatureProvider();
+        doReturn(mSyncAcrossDevicesFeatureUpdater)
+                .when(provider)
+                .getSyncAcrossDevicesFeatureUpdater(any(), any());
+
+        mSyncAcrossDevicesPreferenceController =
+                new SyncAcrossDevicesPreferenceController(mContext, PREFERENCE_KEY);
+
+        mPreferenceGroup = spy(new PreferenceCategory(mContext));
+        doReturn(mPreferenceManager).when(mPreferenceGroup).getPreferenceManager();
+        mPreferenceGroup.setVisible(false);
+
+        mPreferenceGroup.setKey(mSyncAcrossDevicesPreferenceController.getPreferenceKey());
+        mSyncAcrossDevicesPreferenceController.setPreferenceGroup(mPreferenceGroup);
+    }
+
+    @Test
+    public void testGetAvailabilityStatus_noFeatureUpdater_returnUnSupported() {
+        SyncAcrossDevicesFeatureProvider provider =
+                FakeFeatureFactory.setupForTest().getSyncAcrossDevicesFeatureProvider();
+        doReturn(null).when(provider).getSyncAcrossDevicesFeatureUpdater(any(), any());
+
+        SyncAcrossDevicesPreferenceController syncAcrossDevicesPreferenceController =
+                new SyncAcrossDevicesPreferenceController(mContext, PREFERENCE_KEY);
+
+        assertThat(syncAcrossDevicesPreferenceController.getAvailabilityStatus())
+                .isEqualTo(UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    public void testGetAvailabilityStatus_withFeatureUpdater_returnSupported() {
+        assertThat(mSyncAcrossDevicesPreferenceController.getAvailabilityStatus())
+                .isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    public void testUpdatePreferenceVisibility_addFeaturePreference_shouldShowPreference() {
+        Preference preference = new Preference(mContext);
+
+        mSyncAcrossDevicesPreferenceController.onFeatureAdded(preference);
+
+        assertThat(mPreferenceGroup.isVisible()).isTrue();
+    }
+
+    @Test
+    public void testUpdatePreferenceVisibility_removeFeaturePreference_shouldHidePreference() {
+        Preference preference = new Preference(mContext);
+
+        mSyncAcrossDevicesPreferenceController.onFeatureAdded(preference);
+        mSyncAcrossDevicesPreferenceController.onFeatureRemoved(preference);
+
+        assertThat(mPreferenceGroup.isVisible()).isFalse();
+    }
+
+    @Test
+    public void testDisplayPreference_availabilityStatusIsAvailable_shouldForceUpdated() {
+        PreferenceManager preferenceManager = new PreferenceManager(mContext);
+        PreferenceScreen preferenceScreen = preferenceManager.createPreferenceScreen(mContext);
+        preferenceScreen.addPreference(mPreferenceGroup);
+
+        mSyncAcrossDevicesPreferenceController.displayPreference(preferenceScreen);
+
+        verify(mSyncAcrossDevicesFeatureUpdater, times(1)).setPreferenceContext(any());
+        verify(mSyncAcrossDevicesFeatureUpdater, times(1)).forceUpdate();
+    }
+}

tests/robotests/testutils/com/android/settings/testutils/FakeFeatureFactory.java

@@ -40,6 +40,7 @@ import com.android.settings.fuelgauge.PowerUsageFeatureProvider;
 import com.android.settings.homepage.contextualcards.ContextualCardFeatureProvider;
 import com.android.settings.inputmethod.KeyboardSettingsFeatureProvider;
 import com.android.settings.localepicker.LocaleFeatureProvider;
+import com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesFeatureProvider;
 import com.android.settings.onboarding.OnboardingFeatureProvider;
 import com.android.settings.overlay.DockUpdaterFeatureProvider;
 import com.android.settings.overlay.FeatureFactory;
@@ -103,6 +104,7 @@ public class FakeFeatureFactory extends FeatureFactory {
     public PrivateSpaceLoginFeatureProvider mPrivateSpaceLoginFeatureProvider;
     public DisplayFeatureProvider mDisplayFeatureProvider;
     public AudioSharingFeatureProvider mAudioSharingFeatureProvider;
+    public SyncAcrossDevicesFeatureProvider mSyncAcrossDevicesFeatureProvider;
 
     /**
      * Call this in {@code @Before} method of the test class to use fake factory.
@@ -150,9 +152,10 @@ public class FakeFeatureFactory extends FeatureFactory {
         mStylusFeatureProvider = mock(StylusFeatureProvider.class);
         mOnboardingFeatureProvider = mock(OnboardingFeatureProvider.class);
         mFastPairFeatureProvider = mock(FastPairFeatureProvider.class);
-        mPrivateSpaceLoginFeatureProvider =  mock(PrivateSpaceLoginFeatureProvider.class);
+        mPrivateSpaceLoginFeatureProvider = mock(PrivateSpaceLoginFeatureProvider.class);
         mDisplayFeatureProvider = mock(DisplayFeatureProvider.class);
         mAudioSharingFeatureProvider = mock(AudioSharingFeatureProvider.class);
+        mSyncAcrossDevicesFeatureProvider = mock(SyncAcrossDevicesFeatureProvider.class);
     }
 
     @Override
@@ -340,5 +343,10 @@ public class FakeFeatureFactory extends FeatureFactory {
     public AudioSharingFeatureProvider getAudioSharingFeatureProvider() {
         return mAudioSharingFeatureProvider;
     }
+
+    @Override
+    public SyncAcrossDevicesFeatureProvider getSyncAcrossDevicesFeatureProvider() {
+        return mSyncAcrossDevicesFeatureProvider;
+    }
 }
 

tests/spa_unit/src/com/android/settings/testutils/FakeFeatureFactory.kt

@@ -39,6 +39,7 @@ import com.android.settings.fuelgauge.PowerUsageFeatureProvider
 import com.android.settings.homepage.contextualcards.ContextualCardFeatureProvider
 import com.android.settings.inputmethod.KeyboardSettingsFeatureProvider
 import com.android.settings.localepicker.LocaleFeatureProvider
+import com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesFeatureProvider
 import com.android.settings.overlay.DockUpdaterFeatureProvider
 import com.android.settings.overlay.FeatureFactory
 import com.android.settings.overlay.SurveyFeatureProvider
@@ -152,4 +153,6 @@ class FakeFeatureFactory : FeatureFactory() {
         get() = TODO("Not yet implemented")
     override val audioSharingFeatureProvider: AudioSharingFeatureProvider
         get() = TODO("Not yet implemented")
+    override val syncAcrossDevicesFeatureProvider: SyncAcrossDevicesFeatureProvider
+        get() = TODO("Not yet implemented")
 }

tests/unit/src/com/android/settings/testutils/FakeFeatureFactory.java

@@ -40,6 +40,7 @@ import com.android.settings.fuelgauge.PowerUsageFeatureProvider;
 import com.android.settings.homepage.contextualcards.ContextualCardFeatureProvider;
 import com.android.settings.inputmethod.KeyboardSettingsFeatureProvider;
 import com.android.settings.localepicker.LocaleFeatureProvider;
+import com.android.settings.notification.syncacrossdevices.SyncAcrossDevicesFeatureProvider;
 import com.android.settings.onboarding.OnboardingFeatureProvider;
 import com.android.settings.overlay.DockUpdaterFeatureProvider;
 import com.android.settings.overlay.FeatureFactory;
@@ -102,6 +103,7 @@ public class FakeFeatureFactory extends FeatureFactory {
     public PrivateSpaceLoginFeatureProvider mPrivateSpaceLoginFeatureProvider;
     public DisplayFeatureProvider mDisplayFeatureProvider;
     public AudioSharingFeatureProvider mAudioSharingFeatureProvider;
+    public SyncAcrossDevicesFeatureProvider mSyncAcrossDevicesFeatureProvider;
 
     /** Call this in {@code @Before} method of the test class to use fake factory. */
     public static FakeFeatureFactory setupForTest() {
@@ -154,6 +156,7 @@ public class FakeFeatureFactory extends FeatureFactory {
         mPrivateSpaceLoginFeatureProvider = mock(PrivateSpaceLoginFeatureProvider.class);
         mDisplayFeatureProvider = mock(DisplayFeatureProvider.class);
         mAudioSharingFeatureProvider = mock(AudioSharingFeatureProvider.class);
+        mSyncAcrossDevicesFeatureProvider = mock(SyncAcrossDevicesFeatureProvider.class);
     }
 
     @Override
@@ -341,4 +344,9 @@ public class FakeFeatureFactory extends FeatureFactory {
     public AudioSharingFeatureProvider getAudioSharingFeatureProvider() {
         return mAudioSharingFeatureProvider;
     }
+
+    @Override
+    public SyncAcrossDevicesFeatureProvider getSyncAcrossDevicesFeatureProvider() {
+        return mSyncAcrossDevicesFeatureProvider;
+    }
 }