Merge "CAS AIDL: Start thread pool for default service" into main am: 0ff72a9189

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2818539

Change-Id: I83184db02bb1220eb17d6801c23b861b43849bd6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>