Merge "Fix bug 2329540 Part 1 of the fix: when the user doesn't elect to use the...

Merge "Fix bug 2329540  Part 1 of the fix: when the user doesn't elect to use the car dock  for music and media, the APM was not aware of the device being  docked.  This is fixed by dissociating the notification for the APM of  the docking to the dock from the sink state change of the A2DP  device.  Also missing was forcing the volumes to be reevaluated whenever  the device is docked or undocked, as volumes for docks may  differ, even when the same output device is being used."