Shia (Shy-a) LaBeouf (La-Buff). You’re going to hear that name a lot this summer. Not only is he starring in “Disturbia,” opening this Friday (April 13), but later, he has a small, independent film called “Transformers” opening up on the Fourth of July weekend (note the sarcasm). Before we sat down at the Peninsula Hotel for the interview, there was a moment we passed each other in the lobby and did the head nod. The moment fit. He’s a completely normal 20-year-old in an extraordinary situation. He’s got that everyman quality and it shows in “Disturbia.” LaBeouf plays a kid under house arrest who begins to study his neighborhood since he’s stuck at home. Not only does he try and win over the girl next door, he begins to think his