Merge "No fast mixer for DEEP_BUFFER threads" into main am: e3813ad3 am: f0c7ba8a

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3266593



Change-Id: I19eb23b57ed6c3a296b19d7035b2fcd544d7605f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>