Directly use BaseIndexableProvider

- Add function getXmlResourceId, Fragments don't need to write
xml resource id twice.
- Remove getPreferenceControllers from Indexable.java. Because it will
move to SettingsLib later for other apps which don't need this function

Bug: 135053028
Test: robolectric
Change-Id: I1e74519aecdea3dde64a5aea79f08d766dbc0003

src/com/android/settings/DisplaySettings.java

@@ -19,7 +19,6 @@ package com.android.settings;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.os.Bundle;
-import android.provider.SearchIndexableResource;
 
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.display.BrightnessLevelPreferenceController;
@@ -35,7 +34,6 @@ import com.android.settings.display.ThemePreferenceController;
 import com.android.settings.display.TimeoutPreferenceController;
 import com.android.settings.display.VrDisplayPreferenceController;
 import com.android.settings.search.BaseSearchIndexProvider;
-import com.android.settings.search.Indexable;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.Lifecycle;
 import com.android.settingslib.search.SearchIndexable;
@@ -61,7 +59,7 @@ public class DisplaySettings extends DashboardFragment {
 
     @Override
     protected int getPreferenceScreenResId() {
-        return R.xml.display_settings;
+        return SEARCH_INDEX_DATA_PROVIDER.getXmlResourceId();
     }
 
     @Override
@@ -97,7 +95,7 @@ public class DisplaySettings extends DashboardFragment {
         return controllers;
     }
 
-    public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
             new BaseSearchIndexProvider(R.xml.display_settings) {
 
                 @Override