Merge changes from topic "aidlize-audioflinger2"

* changes:
  Break-up libaudioclient_aidl_conversion
  Add missing header dependencies
  Prepare openOutput() signature to AIDL conversion
  Extract VALUE_OR_RETURN_STATUS to AidlConversion
  Disambiguate types
  Add some missing @hide annotations
  Prepare openInput() signature to AIDL conversion
  AIDLize createEffect params
  Include the returned IAudio{Track,Record} in response parcelable
  Make IAudioRecord pure (stable) AIDL
  Convert IAudioTrack to AIDL