Merge "CAS AIDL: Start thread pool for default service" into main am: 0ff72a91 am: e4e93f30

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



Change-Id: I4f0076387976634aeeac6d6b5a378238e56a2013
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>