Stallman discussed this on his personal site back on 4/22/16:
https://www.stallman.org/archives/2016-jan-apr.html
"The idea of a tool to determine whether a driver's phone was used for text
messaging at the time of an accident is fine in principle, but it is almost
impossible in practice unless it snoops on a lot more than that. I get the
impression Android Auto is based on using proprietary software to restrict
users."
He links to this article:
https://freedom-to-tinker.com/blog/dwallach/on-distracted-driving-and-required-phone-searches/