NEW YORK — Kamala Harris made a surprise appearance on “Saturday Night Live” in the final days before the presidential election, playing herself as the mirror-image double of Maya Rudolph’s version of her in the show’s cold open. The first lines the candidate spoke as she sat across from Rudolph, their outfits identical, were drowned out by cheers from the audience. “It is nice to see you Kamala,” Harris told Rudolph with a broad grin she kept throughout the sketch.