Restrict screen saver settings searches to enabled users.

If a user can't enable screen saver, they shouldn't be able to
accidentally find screen saver related settings in Settings.

Bug: 260276394
Test: atest ScreenSaverPreferenceControllerTest
Test: manually by settings up a second user on a device that supports
screen saver, switching to that user, and making sure that searches for
"screen saver" don't accidentally reveal settings that can't be
accessed.

Change-Id: If2f465b2acb548455f0868507cf47217ea1a626f

src/com/android/settings/dream/DreamSettings.java

@@ -36,6 +36,7 @@ import androidx.preference.Preference;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.R;
+import com.android.settings.Utils;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.core.AbstractPreferenceController;
@@ -213,6 +214,17 @@ public class DreamSettings extends DashboardFragment implements OnMainSwitchChan
     }
 
     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.dream_fragment_overview);
+            new SearchIndexProvider(R.xml.dream_fragment_overview);
+
+    static class SearchIndexProvider extends BaseSearchIndexProvider {
+        SearchIndexProvider(int xmlRes) {
+            super(xmlRes);
+        }
+
+        @Override
+        protected boolean isPageSearchEnabled(Context context) {
+            return Utils.areDreamsAvailableToCurrentUser(context);
+        }
+    }
 }