Members of President-elect Donald Trump’s transition team have told advisers they plan to make a federal framework for fully self-driving vehicles one of the Transportation Department’s priorities, according to people familiar with the matter.If new rules enable cars without human controls, that would directly benefit Elon Musk, the Tesla Inc. chief executive officer and Trump mega-donor who has become a powerful fixture in the president-elect’s inner circle. He has bet the future of the EV make...