audio: Add API to get io handle am: 1d2d51a55d

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

Change-Id: Iedce4d1396e76a26d5c828a6351bb926e89d4cd5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>