When I met him in San Francisco this week, 22-year-old Austin Russell couldn’t help but smile when I mentioned the acrimonious legal battle between Uber and Alphabet’s self-driving car unit, Waymo. Waymo says a top engineer took secret plans for lidar sensors, which map the world in 3-D using lasers, to the ride-sharing company. Talk of the suit makes Russell grin because he says it shows the new lidar sensor his startup has spent five