Merge "Audio AIDL : Add placeholder implementation and VTS test case for AGC1" am: adce82f9b5 am: 1d7b1df1c8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2437832

Change-Id: I5241a56edf803d14fcaf715d090beb5b7059d643
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>