Merge "Audio : Add remote submix stream implementation" am: 12e6f0c42e am: cc562a7e03 am: e6f3ce4e0d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2560751

Change-Id: Ie9e1f4b1834600f1c7ae3c0908c2ff974ce8a55c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>