Add new method to preference controller base for dynamic index.

- Add updateDynamicRawDataToIndex method.
- Implement preference controller index in BaseSearchIndexProvider.

Fixes: 144545478
Test: make RunSettingsGoogleRoboTests -j
      make RunSettingsRoboTests ROBOTEST_FILTER=
      com.android.settings.search.BaseSearchIndexProviderTest
Change-Id: Ibb11002227b280102b45d7c0610eae48ecf4c0f3

src/com/android/settings/core/BasePreferenceController.java

@@ -274,6 +274,14 @@ public abstract class BasePreferenceController extends AbstractPreferenceControl
     public void updateRawDataToIndex(List<SearchIndexableRaw> rawData) {
     }
 
+    /**
+     * Updates dynamic raw data for search provider.
+     *
+     * Called by SearchIndexProvider#getDynamicRawDataToIndex
+     */
+    public void updateDynamicRawDataToIndex(List<SearchIndexableRaw> rawData) {
+    }
+
     /**
      * Set {@link UiBlockListener}
      *
@@ -308,4 +316,4 @@ public abstract class BasePreferenceController extends AbstractPreferenceControl
      */
     public interface UiBlocker {
     }
-}
+}

src/com/android/settings/core/PreferenceControllerMixin.java

@@ -18,8 +18,8 @@ package com.android.settings.core;
 import android.text.TextUtils;
 import android.util.Log;
 
-import com.android.settingslib.search.SearchIndexableRaw;
 import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.search.SearchIndexableRaw;
 
 import java.util.List;
 
@@ -62,4 +62,12 @@ public interface PreferenceControllerMixin {
      */
     default void updateRawDataToIndex(List<SearchIndexableRaw> rawData) {
     }
+
+    /**
+     * Updates dynamic raw data for search provider.
+     *
+     * Called by SearchIndexProvider#getDynamicRawDataToIndex
+     */
+    default void updateDynamicRawDataToIndex(List<SearchIndexableRaw> rawData) {
+    }
 }

src/com/android/settings/search/BaseSearchIndexProvider.java

@@ -77,8 +77,25 @@ public class BaseSearchIndexProvider implements Indexable.SearchIndexProvider {
     }
 
     @Override
+    @CallSuper
     public List<SearchIndexableRaw> getDynamicRawDataToIndex(Context context, boolean enabled) {
-        return null;
+        final List<SearchIndexableRaw> dynamicRaws = new ArrayList<>();
+        final List<AbstractPreferenceController> controllers = getPreferenceControllers(context);
+        if (controllers == null || controllers.isEmpty()) {
+            return dynamicRaws;
+        }
+        for (AbstractPreferenceController controller : controllers) {
+            if (controller instanceof PreferenceControllerMixin) {
+                ((PreferenceControllerMixin) controller).updateDynamicRawDataToIndex(dynamicRaws);
+            } else if (controller instanceof BasePreferenceController) {
+                ((BasePreferenceController) controller).updateDynamicRawDataToIndex(dynamicRaws);
+            } else {
+                Log.e(TAG, controller.getClass().getName()
+                        + " must implement " + PreferenceControllerMixin.class.getName()
+                        + " treating the dynamic indexable");
+            }
+        }
+        return dynamicRaws;
     }
 
     @Override