AVRCP Controller AbsoluteVolumeNotification

Update AbsoluteVolumeNotification request to properly respond to
requests based upon the Fixed vs Dynamic volume levels.

Bug: 129478624
Test: atest com.android.bluetooth.avrcpcontroller.AvrcpControllerStateMachineTest#testRegisterAbsVolumeNotification
Change-Id: Ic9b745641a84712c005d40ecec50e55e9684d3ef
(cherry picked from commit 8fd119d8)

Merged-In: Ic9b745641a84712c005d40ecec50e55e9684d3ef
Change-Id: I1212a70ab84e3aed926bcfcac04dc62efed4b489