Merge "audio: Allow specifying "default" stream type in V7" am: 9dac2b95fc am: 61a4a2a00d am: d762726b64 am: 10b7be71de

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1582322

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ibe8eee3433c7fd464df26d91dafb5425e727fb3a