Add audio device type MULTICHANNEL_GROUP am: aff9b97bca

Original change: https://android-review.googlesource.com/c/platform/system/hardware/interfaces/+/3456213

Change-Id: I394e5112422bf2b9b2ff6e79b2f9b3e31caf60cc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>