Refactored CarServiceHelperService to use VHAL classes and UserHalHelper. am: abd8867d85 am: 29a05e8492 am: 6c2eaed419

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/car/services/+/10743643

Change-Id: Idaf1c272583493f06aaf87452376d29ed0ae49d3
tree: e67c2f26c6603f0ee5e8762a5a624a9ab089e94c
  1. src/
  2. tests/
  3. Android.bp
  4. OWNERS
  5. PREUPLOAD.cfg