[automerger skipped] libaudiohal: Make effect descriptors cache thread-safe am: 0288c75765 -s ours am: cbbea69964 -s ours am: cb0c544c91 -s ours

am skip reason: Merged-In Id5f3615074e540afca33a83d53d2b84634df89cf with SHA-1 2b9611eade is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2329975

Change-Id: I356a6d22b39712115d9c11cfb339e41b7a99c5c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>