This comes up a lot, and short of a unit I've seen for Australian rigs from Alpine...I've neither seen nor heard of a US spec solution. If somebody finds one? That would be big news.
My personal solution is a home-made iPad holder that goes over the top of the screen...which I keep turned off, save for adjustments like climate, etc. I only do the iPad solution on long trips though. iPhone for other nav... No built-in solution will ever be as up-to-date & live as Google...
I put in a CD Mount magnetic holder for my phone. I also installed the most recent version of Android Auto that allows AA to be used directly on my phone screen automatically when I start the car (bluetooth detection feature), giving me instant and simplified access to Google Maps, Pandora, etc. It also turns off AA when you turn the car off. Android Auto v2.0 is rolling out with on-phone mode [APK Download]