Merge "libaudiohal: Fix initialization of SinkMetadata for HAL V7" am: 1b8e0f7dd5 am: 412ec213b5

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1580726

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I50a7af23c4b436e9182f1ae07e38bacaf4d93852