I have my media playback app working pretty well, the only issue from my testing, there is an edge case where media can be added on the phone, but it's not reflected in the browsing view in Android Auto until the phone is disconnected and reconnected.
I'm trying to trigger a update message, but having trouble finding the correct call using media3 and MediaLibraryService.
I've got as far as publishing a broadcast message from my media database that's been updated and catching it in my MediaLibraryService, however I can't find anything in the documentation that indicates how I might trigger an update that Android Auto is aware of.