Check if AIDL service is declared before calling wait am: 781b4ff19e

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2138032

Change-Id: Iebf69fce283b4e57ad9275c2a74bf8cc7b74933d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>