Audio: Copy HAL V6 into V7 am: 60ced768f3 am: ccf6fefbe5 am: 7ecfd10a80

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1475340

Change-Id: Id0e9e8f69a2fca6bca86e93ae066a392eaf53e78