Merge changes from topic 'audio-primary-hal-vts-fix' into oc-dev

* changes:
  Audio HAL: A volume/gain outside of [0,1] is an error
  Audio HAL VTS: Log test unexpected behaviour
  Audio HAL VTS: Improve ASSERT of Result and Return
  Audio HAL VTS: stopped stream state getters may return INVALID_STATE
  Audio HAL VTS: setGain allow -0.0
  Audio HAL VTS: Some methods are optional
  Audio HAL VTS: GetPresentationPosition may return 0 on stop stream
  Audio HAL VTS: getDevice() == NONE => not supported
  Audio HAL VTS: Getter test assert logic was incorrect
  Audio HAL VTS: debugDump can only test for crash
  Audio HAL VTS: Sanitize prepareFor{Writing,Reading} input size
  Audio HAL VTS: refactor prepareFor{Reading,Writing}
  Audio HAL VTS: Sanitize setMode input
  Audio HAL VTS: Allow OK when setting a non existing parameter
  Audio HAL VTS: differentiate getParam success/failure/not_implemented
  Audio HAL VTS: Fix style on modified files