INDIANAPOLIS — Moments after Fernando Mendoza arrived for his formal visit with the Raiders at the scouting combine this week, someone handed him a phone. The voice that greeted him on the other end was familiar to anyone who’s been a football fan for the last few decades, let alone a college quarterback on the cusp of realizing his lifelong dream of playing in the NFL. Only Tom Brady, the seven-time Super Bowl champion and soon-to-be first ballot Hall of Famer, wasn’t just congratulating