Port "Framework Track Control : Switch from broadcast to audio service"

Ordered broadcast is unreliable.
Switch to using the Audio Service's dispatchMediaKeyWithWakeLockToAudioService
as it sends the event to the correct receiver.

Patchset 2 - Switch power widgets over as well
Patchset 3 - Rename handler 'what' message to be more consistent
Patchset 4 - Fix renaming mishap

Change-Id: I022720a551b94637f7b16258dfb6a22234bcb736
Fix FindBugs issues

IntProperty: Infinite recursive loop
SQLiteSession: Null pointer dereference
UsbStoreActivity: Null pointer derefence
LocationManagerService: No relationship between generic parameter and method argument
ActivityManagerService: Call to equals() comparing different types
ChooseAccountTypeActivity: Possible null pointer dereference
RuimRecords: Possible null pointer derefence

Change-Id: Ibf8576e4cb71aaf7173adfd6a8204760d0548f63