Merge "Audio AIDL : Add libeffects downmix implementation uuid" am: b02f80b5c4 am: 2c294f8be0 am: dda535092e

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2352971

Change-Id: Ifb7bf2f18e15b3adccc35d941ff2dc112325b0c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>