Prefer artist over album artist.

E.g. when playing a compilation title, one very likely wants to see the real
artist instead of 'Various artists'.

Change-Id: Ie200f2f8b0b90d3470c2e2e4ca6f91f9b117fb1f
Allow adjusting progress on touch events.

Change-Id: Ide0a7ae057a62f3631a32eeaa63f3e04dec5bf54
Fix empty page being activated if music controls are disabled and music
is playing.

Change-Id: I76e00e4c58dc86ce0bf4e88c0e6be551950b6969
BroadcastReceiver : Get sender of broadcasts

Add internal api for receiving the sender of a broadcast

Change-Id: I28ae614ef92101ab6b9beadc3c965d16b1f393f6

Conflicts:
	core/java/android/app/IActivityManager.java