So much of writer-director John Lee Hancock’s psychological cop thriller, “The Little Things,” seems recognizable and pre-ordained on the surface. The drama offers the trope of a grizzled veteran cop (Denzel Washington) conflicting with a talented younger detective who’s made the grade (Rami Malek), the way they clash, break balls, their various obsessions, a haunted past, and a quirky, alleged serial killer (Jared Leto), not afraid to tease and taunt the police.