MotoActions: General cleanup

MotoActions: General cleanup

* Remove unused classes, methods, interfaces, imports
* Reorder imports
* Add final where applicable
* Fix line lengths
* Use local variables where possible
* Replace deprecated Vibrator.vibrate(long) with the successor
* Simplify conditions where they are always met
* Rearrange tags and remove unused schemas in resources
* Merge ScreenReceiver into the service
  -> a separate, instantiated but never called-into class makes
     one think it's unused

Change-Id: I05cff7ecaf424c166fedceb1f4f8963164c6085a