NEW YORK -- Dale Dickey tends to get “those crusty roles,” as she heard someone once call them. A familiar, craggy face from films like “Winter’s Bone” and “Hell or High Water,” Dickey has long been a riveting supporting player in rural dramas.But in the Sundance entry “A Love Song,” Dickey, long a standout character actor, finally takes the lead. Even for her, it felt a little strange.“I don’t do leads in films.