[DS] DSDS support for Settings

+ Rebase and modify as APIs rename.
+ Fix bugs on set sub's name as title.
+ Enabled Sim Settings.

Change-Id: Ic731c7882be95b86b6b8dcdd3f208a6125681f3e

src/com/android/settings/Utils.java

@@ -876,9 +876,7 @@ public final class Utils {
         final TelephonyManager tm =
                 (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
 
-        // TODO: Uncomment to re-enable SimSettings.
         return tm.getSimCount() > 0;
-        //return false;
     }
 
     /**