Actors Jonah Hill and Channing Tatum are back undercover as bumbling cops masquerading as college students to crack a campus drug ring in the action comedy “22 Jump Street,” which pokes fun at sequels and lampoons the pair’s bromance. The plot will be familiar to fans of 2012’s “21 Jump Street,” an R-rated, box office hit that earned $200 million worldwide and followed the duo’s slapstick antics as they returned to high school for a similar assignment. The movie opens in U.S. theaters on Friday.