Fix bug #16896118 SIM cards should ONLY appear in search results for devices with 2+ SIM slots

- add the proper SearchIndexProvider to SimSettings
- allow indexing only an only if showSimCardTile() is true
- add Utils.showSimCardTile()

Change-Id: I5df2284d32f91fa454e1edebf1139d00593138a0

src/com/android/settings/SettingsActivity.java

@@ -1042,7 +1042,7 @@ public class SettingsActivity extends Activity
                             }
 
                             // Show the SIM Cards setting if there are more than 2 SIMs installed.
-                            if(tile.id != R.id.sim_settings || SimSettings.showSimCardScreen(this)){
+                            if(tile.id != R.id.sim_settings || Utils.showSimCardTile(this)){
                                 category.addTile(tile);
                             }