Merge "CAS AIDL: Start thread pool for default service" into main am: 0ff72a9189 am: 3953dbdaaf am: 3dd83d0aed

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

Change-Id: I9c11f2de0ba0d821173259a12aa0694040c8b378
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>