title: Streams and AudioAttributes at Automotive OS
body: <p>We try to adapt our navigator application for Android Automotive OS and we see that if we use <code>STREAM_MUSIC</code> for navigator notifications then it doesn't mix with FM-radio.
  If we use <code>STREAM_NOTIFICATION</code> then navi does mix with FM-radio, but there is no way in Android Car Settings to change <code>STREAM_NOTIFICATION</code> volume.
  Do we understand correctly that streams doesn't map to AudioAttributes in Automotive OS automatically and all navigator applications will have to move to <code>USAGE_ASSISTANCE_NAVIGATION_GUIDANCE</code> to run properly on Automotive OS?</p>