Merge "Update BackgroundExecutor to use LocklessQueue" into udc-dev am: 052dcb5c2f am: c096603fc2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23295158

Change-Id: I36992cfb42b498042909b9388c27b1b79fbe6ab2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>