Black Mirror, this is AMC’s Soulmates—a new anthology series revolving around one question: What would you do if a test could find your soulmate? By the end of the first episode, you might have a new opinion.(Disclaimer: This is where I tell you that I’ve only seen the series premiere, so this review is a reflection on “Watershed,” the emotional first installment starring and High Fidelity’s Kingsley Ben-Adir.)Set 15 years in the future—far enough ahead for all tech to turn translucent, but not