Rebecca Rubin News Editor, OnlineAfter eight seasons as Arya Stark on “Game of Thrones,” Maisie Williams is no stranger to blood, violence, guts and gore.In her latest role, as a vengeful girlfriend in the gruesome thriller “The Owners,” Williams isn’t afraid to get down and dirty in the name of survival. The ’90s-set movie — directed by Julius Berg and written by Berg and Matthieu Gompel — follows childhood friends who break in and attempt to rob their elderly neighbor’s empty mansion.