I would literally not buy a car with this functionality. It is beyond irksome for my passenger to not be able to type on a touch screen while the car is in motion.
This has been the case for some functions for a while. A 2010 car my parents have will not let you enter the settings to do things like pair bluetooth while the car is moving.
Tie it to a weight sensor in the passenger front seat.
Then you just stick a heavy object on the seat to trip it.