Merge "Audio AIDL : Add placeholder implementation and VTS test case for AGC1" am: adce82f9b5 am: 1d7b1df1c8 am: aca1e4fc99

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

Change-Id: I10f190cad8dbf9b7789d59f172eb0157c5560a8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>