Added SearchIndexProvider for UserSettings

It enables customizations for certain cases like whether the user is able to
create restricted profiles or multiuser UI is disabled.

Bug: 21197002
Change-Id: Ia672c0f9bb451877f8debe04438b46cb2b7e9242

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

@@ -208,7 +208,7 @@ public final class SearchIndexableResources {
         sResMap.put(UserSettings.class.getName(),
                 new SearchIndexableResource(
                         Ranking.getRankForClassName(UserSettings.class.getName()),
-                        R.xml.user_settings,
+                        NO_DATA_RES_ID,
                         UserSettings.class.getName(),
                         R.drawable.ic_settings_multiuser));