Two animated “Short Trek” installments arrive, and we liked one more than the other. In “Ephraim and Dot”, a mama tardigrade loses her eggs and fights a cute robot. In “The Girl Who Made the Stars”, young Michael Burnham is afraid of the dark and her dad tells her a story. Onward to 2020, The Year of Star Trek! We’ll have one more “Short Trek” and then it’s time for “Star Trek: Picard.”