On Youtube you can find two guys both from Bangkok Thailand who got Android Auto to work in the new Porsche PCM 4.0 system, in the videos it's both a Porsche 911 991.2:
I am still waiting for delivery of my 991.2, but since I learned on the web
Google maps VS PCM satnav - Porsche Macan Forums that PCM NAV w/ Connect Plus is NOT Google Maps, but instead Porsche NAV augmented by data from Google, I am not sure if it as good as Google Maps Navigation on Android. Especially things like live accident warnings and giving a suggestion for a faster route while driving, the "route is clear" info or the live in map reroute suggestions "x mins faster/slower" makes Google Maps Navigation the best of its kind.