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

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

Change-Id: Ia4e222b53997ea34f9e86dc55937b0c4edb481fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>