Default Audio HAL service: add V7, remove V2 am: b4443504f1 am: 7707947ae7 am: 61e009c30f

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1576845

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I79b341fffce1c78cef59a1ed2811d7aeed02c2aa