Add playback mute notifications for mmap tracks

Added the portId callback to the aaudio client which is registering it
with the AudioService similar to the AudioTrack clients logic.
MMap tracks have a different way of computing the volume. Some volume
components are computed in the aaudioservice. Note that AppOps mute,
client mute and volume shaper mute are not available for AAudio MMap tracks.

Test: dumpsys audio
Bug: 235521198
Change-Id: I05edaa6646cd21647f1602c1ce695be2233a08fc