Merge "EnvironmentalReverb: Add AIDL placeholder implementation and its unit test" am: 4d58d01283

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2309206

Change-Id: I99678311cb55ab4b00befd006cd746d84c4d8453
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>