Death is not something Chilean filmmaker Pablo Larraín is afraid of. From “Jackie” to “El Conde” and now with his latest feature, “Maria,” Larraín has often explored the effect mortality has on individuals, especially on those with the ability to make an impact on others, never shying away from the mysteries the subject offers, but instead creating heart-rending, often celebratory studies of how certain figures, against all odds, find meaning in their lives. In reference to his loose “Important Women” trilogy, consisting of “Jackie,” “Spencer,” and “Maria,” Larraín sets his lens on three iconoclasts who became icons in their own