If you ever want to know how many apps use gapps on your phone, android apps with the hook have a “google play services avalability” notification channel, ive seen the settings app spam me notifications about its longing for gapps.
Dont let me discourage you though.
So software is running on your car that desprately tries to extract and sent your peronal information to its command and control server.
I was going to say “be stingy with access to the OBD / CAN port” but if wireless is involved then avoid the beacon (its wireless and tucked away in a corner so you dont know if its there) or get your data stolen. I feel violated.