audio: Add API to get io handle am: 1d2d51a55d am: 9d5a3d5ad7 am: 68d5277f48

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2393093

Change-Id: I80a21266f4f71ef4227c1cc36f4a2df7491fb7e4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>