Merge "Add EventFlag for effect HAL thread processing" am: fe4b88ab73

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2529223

Change-Id: I106f1e488007de0e89ebcfeb2f8f5928f725f96e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>