Comedy writer-producers Isaac Aptaker and Elizabeth Berger (The Neighbors) have signed a two-year overall deal at 20th Century Fox TV Studios. Under the agreement, they will develop projects with the studio and join Fox’s fall comedy Grandfathered as supervising producers. It’s a reunion of sorts for the pair, who got their first professional writing gig at 20th on the Fox show Friends With Benefits and spent two seasons working with Grandfathered EP Dan Fogelman on ABC’s…