Media: Make sure mVolumeController is not null

* mVolumeController is throwing NPEs all over the place in this class, which
  causes apps like Chromecast to shit the bed when using Google Play Music
  and/or Google Play Movies
* Catch additional exception on try/catch already in place and throw in a null
  check to prevent apps from crashing until null mVolumeController is rectified

Change-Id: I7a883aa85256d5dc6af6f37978676b136cb40d0d
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>
Keyguard: disable statusbar clock for dashclock, lockclock and desclock

afaik this was an original commit from Danesh and we extended it later.
Whatever thanks to him in this case :)

Change-Id: I67a370b0a76f938fa3e022e8c467f2d6ebca87c0