MOVIES— “Ma Rainey’s Black Bottom” was always going to be an event picture, even on Netflix, where it will be available Friday. Wilson’s 1982 play is set around a recording session in 1920s Chicago as a blues band awaits the arrival of Ma Rainey (Davis). — AP Film Writer Lindsey BahrMUSIC— Paul McCartney will release the final album in a trilogy of classics on Friday. “McCartney III” comes 50 years after 1980’s “McCartney II” and 60 years after “McCartney,” his solo debut released in 1970. — Director George C. Wolfe said that when he signed on to direct “Ma Rainey’s Black Bottom,” he instantly knew he wanted to work with Branford Marsalis.