Dan Harmon’s real-life girlfriend, Cody Heller, finds his sex doll, befriends it, and decides to team up to work on a spec script for a new television show. That’s the elevator pitch for “Dummy,” Heller’s bizarre and wonderful new show on fledgling streaming service Quibi. The series stars Anna Kendrick as Heller, Donal Logue (“Gotham,”...