You can disable auto updates in Aurora Settings and F-Droid Settings. If that isn’t stopping them, please start a new thread with this issue.
@gc35sdd after enabling Android Auto in “Preinstalled Apps” (and reboot) did you then update AA from Aurora before attempting to use Android Auto? This is needed as the “Preinstalled App” version is effectively a stub that enables it to be installed, but it won’t fully function until the full Google version (from Aurora) is installed (via “installing the update”).