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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic4f37f3ba520027ec22693ad4f6379ba59bd074e