Add interfaces that CarService uses to talk to car power policy daemon

- ICarPowerPolicySystemNotification which has notifyCarServiceReady and
notifyPowerPolicyChange is added.
- onPolicyChanging is removed from ICarPowerPolicyChangeCallback.
- AIDL build name for vendor is changed to follow the AIDL naming rule:
it's android.frameworks.automotive.powerpolicy.

Bug: 169987225
Test: build okay
Change-Id: I5ef577946c1f959a6a7bab5306e24e511a1c6fdf
10 files changed