Reverted CarServiceHelperService.runAsync() to use its own thread. am: a9a3d2690f am: d6946cb52e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/car/services/+/11971851

Change-Id: I221897413aaf024719f61ea88e3e45e4255c08a5
tree: e67c2f26c6603f0ee5e8762a5a624a9ab089e94c
  1. src/
  2. tests/
  3. Android.bp
  4. OWNERS
  5. PREUPLOAD.cfg