Renate Reinsve in the movie “Armand.” An appropriately Bergmanesque psychodrama from writer-director Halfdan Ullmann Tøndel, the grandson of Ingmar Bergman and Liv Ullmann, “Armand” unravels from an unseen “incident” between two primary-school students. That I cannot provide much more than that turns out to be the point: Described only vaguely, confusingly and second- or third-hand, what happened between Armand and …