Glen Powell loves a disguise. From his headlining gig beneath heavy make-up on TV’s “Chad Powers” to going incognito mode in movies like “The Working Man,” the ascendant actor elevates the subtext of role-playing to a defining function of his star persona. These roles provide a window into Powell’s philosophy as an actor, which he explicitly articulated in “Hit Man” (a movie he additionally co-wrote): masquerading as a personality can usually present a gateway into understanding and shaping one’s true self.