Merge changes from topic "remove_hard_coded_attributes"
* changes:
audio: get rid of hardcoded translation stream <--> attributes
audiopolicy: engine: remove deprecated APIs
audiopolicy: exclusive Preferred Device
audiopolicy: apm: switch to new Engine APIs
audio policy service: Add introspection API to retrieve AudioProductStrategies
audiopolicy: engineconfigurable: Merge Policy Engine and Wrapper configuration files
audiopolicy: engineconfigurable: add configuration of ProductStrategies
audiopolicy: engine: Add ProductStrategy common code