New York Daily News ‘Whitney’: How ultimate pop icon turned 2017-08-20 - 8 p.m. (Ch. 4) American Ninja Warrior 10 p.m. on (SYFY) Face Off: Game Face 9 p.m. on (FOOD) Worst Cooks in America 8 p.m. (Ch. 7) Boy Band 9 p.m. (HALL) Movie: Sun, Sand & Romance BY DAVID HINCKLEY S The Tick howtime’s new Whitney Houston documentary is not always fun to watch — and that’s coming from its executive producer. “An accurate portrayal of her life,” says Vinnie Malhotra, “is unfortunately a painful one.” Premiering Friday at 9 p.m.,...