Merge "EARC: Add eARC AIDL files" am: 7fb9baae1c am: 87243fbbd7 am: f3686eba77

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2308889

Change-Id: Ib4f858b958a6eecdb07bf9d0a7eb4bee4758f8c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>