Add AIDL API feedback

The changes addressed:
- Add audio fade offender definition which corresponds to the fade
  offender timeout
- Use core audio zone id in car audio zone definition, this definition
  already matches the one defined on the audio manager side
- Add more documentation for volume group name usages. Given that
  previous versions of audio policy engine APIs did not support volume
  group name must be supported concurrenlty until volume group ID is
  fully supported by vendors.

Bug: 359686069
Test: atest com.android.car.audio
Flag: android.car.feature.audio_control_hal_configuration
Change-Id: I78b538a90ccf0ed74b2476175776d723fc7e8cf0