Merge changes from topics "pi-car-1-Interface", "pi-car-dev-2-Interfaces"

* changes:
  change Java doc and method return type
  added dial test
  interface for BluetoothAudioHelperTest
  Create an interface for google map
  modify IAutoAccountsHelper
  added showAllApps() method
  Added method due to change in menu structure
  Create an interface for AccountsTest
  Changed methods input and output type
  android auto app info setting tests interface
  android auto system and app info settings test interface
  android auto mojave datetime setting test interface
  add new features
  Create Google Play interface
  Add hardkeyshelper. Rename next and previous with softkeys.
  Creat Home Screen Interface
  Change IAutoSettingHelper interface