Smartphone integration in your car's head unit isn't of all that much use if it's only going to play nice with one brand or another (we're looking at you, Mini Connected). Johnson Controls is being rather more open with what it's calling the Connected Center Stack, basically a framework that OEMs and aftermarket radio makers can build upon to create their ultimate infotainment system. It quite naturally connected and played audio over USB or Bluetooth, augmenting that with support for P
