It’s easy to become blase about China’s auto market, especially now that growth there has gone from white hot to merely off-white hot. Up 15 percent in 2016? Ho-hum. But just stop and marvel for a moment at the volume even a plateauing Chinese market represents — 24 million passenger vehicles last year, according to IHS Markit. Twenty-four million! With numbers like that, it ought to be China — not the U.S., Europe or Japan — that dictates the future of what we call global ve