audio: Simplify AudioHalBinderServiceUtil::waitForFired() am: a76d4d8899 am: fcf3a1b36b

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2819039

Change-Id: Icb56f383aecaa0be9d9567df68108104edc4a280
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>