The Canadian actor Lamar Johnson has been having a moment, from his acclaimed performance in Clement Virgo’s film “Brother” to his Emmy nomination for his emotional role in the hit post-apocalyptic drama “The Last of Us.” At this year’s Canadian Screen Awards, Lamar will receive the Radius Award, which is presented to a Canadian whose work is making waves globally. He chats with Tom about the award, learning ASL for his role on “The Last of Us,” and what all of this success means to him.