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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I927531ce6e4cc2de8a41a283dcee6f112d44259b