[2/3] Av: Audio Themes Support

Conflicts:
	services/camera/libcameraservice/CameraService.cpp

Fw/b: http://gerrit.dirtyunicorns.com/#/c/2148/
Settings: http://gerrit.dirtyunicorns.com/#/c/2156/

Change-Id: Iaebddd8ebf8b21633e802589a4a6175492df8f29