HOLLYWOOD — Thinking of being a producer or a movie star?At Thursday’s Chinese Theater preem of “ATL,” producer Will Smith said, “It’s way easier being a producer, especially when you’re producing partner does all the work.” And partner James Lassiter seemed to have no problem with the system. Lassiter, who has known Smith since high school, said, “We both know our roles. My role is not having my picture taken. His role is not being in the office from 8 a.m. to 10 p.m.” Pic’s after-party was at the nearby Memphis restaurant, which was originally the historic Janes House, the first single-family Victorian home on Hollywood Blvd. It was built in 1903.