Merge "Add a2dp vendor codec extension" am: 82d991db1e am: 529c0812ae am: 1a2c9ab210 am: 500aa8e37d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1955924

Change-Id: I019398357c0139df1ac0ebfa976197a90b9a5c69