I am looking to create a 3rd party android automotive of our currently existing android mobile application. The application will not be listed on the play store it is just for internal use. The issue that I am facing is that the SDK is limited and it seems that I can only create applications from a set of templates (Navigation, Media, Messaging). My mobile application uses its own custom map and functionalities. I checked that people used to create 3rd party apps before but google revoked access to this 3rd party sdk and that I have to ask google for access. Can I make any apps for Android Auto?
Also, by going through the docs it's stated here "In order for your app to run on a real head unit (not the desktop head unit we provide), your app must be distributed through the Google Play Store."https://developer.android.com/training/cars/apps/auto#car-head-unit
If anyone can shed light on this whether custom apps are possible now for Android Auto and whether we have to go through the play store in order to use the app in a real head unit.