Can't launch Android Auto, keeps asking to enable drawing over other apps
Check all the other permissions that Android Auto might need.  For me, the notification access permission was disabled for some reason, but Android Auto never took me to that setting until after I rebooted.  There are instances where apps need some permissions toggled off then on again in order to work properly after an update.  For instances, after updating LightFlow, the app gets me to toggle notification access off and on.