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
Merged-In: Ic9b745641a84712c005d40ecec50e55e9684d3ef
Merged-In: I610dd3eff955e926a2c52921c0ef347db80c0cae
(cherry picked from commit 3897e86022f7c061f874fffa6b8058d7fa4aa108)

Change-Id: I253484d27bf2e0a26307084c23ce983d281e6874
2 files changed