audio: Retain IBinder for instances with MinSchedulerPolicy am: df5feba141

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2356911

Change-Id: Iedc382e2e2689f906f6aadbae2af6b2f2ed18428
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>