Merge "libaudiohal: Implement stream opening" am: 6fa1c89b am: 50094a56

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



Change-Id: I37fef34e3adddc0299647f02d73bf1795f39f4cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>