Merge "libaudiohal: Implement stream opening" am: 6fa1c89b99

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2406214

Change-Id: Ice320c5a1c4ad63b46c511a842a54f6eaccb9240
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>