Minor refactor of CarServiceHelperService am: 840bdf338e am: b592ecf8c8

Change-Id: I9c8b22baee1cd7c144f8266db975a5c4453e3908
tree: 162064b6050fa199b3bbb0ba86ed398e048b1d60
  1. src/
  2. tests/
  3. Android.bp
  4. OWNERS