TLDR - get Poweramp
Recently switched my whole setup over from Plex - and won't look be looking back any time soon. Only thing missing was in-car playback on Android Auto.
Maybe I'm old school, but I always sync my favorite albums to my phone and play them locally. No need to use mobile data just for music I play over and over on my ~2 hrs of daily commuting... It is a must to have Android Auto because I always drive with Waze for route optimization in rush hour.
The problem I had with nearly every Android Auto supported player is that it can't read from Emby's data folder. It