Merge "audio: Accept I/O handle for mix ports from the client" am: 2f891b991e am: 2ce2f9a909

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2449964

Change-Id: Ibb88f90989498f3d76fb0db4782ffeec3fa25ed9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>