DETROIT — General Motors, beware. Wednesday’s announcement that Toyota will pay $1.2 billion to avoid criminal prosecution for hiding information in a recall case could be a glimpse into your future. It’s also a warning to anyone selling cars in the U.S.: Although the federal government’s road-safety watchdog doesn’t have big fangs, the Justice Department does. The National Highway Traffic Safety Administration’s maximum fine for hiding information is $35 million, a pittance to …