Merge "AHAL: support volume control for USB audio HAL." am: 0abca2170b am: d8b77aef82

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2461293

Change-Id: I6962e4d34ad79a5c82e98c0f63823a466353d1d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>