Verzuz — I mean, who would want to battle him? — but he brought in a very special guest musician to kick off his performance at the Apollo on Saturday night.That would be Keyon Harrold, the veteran trumpeter and member of D’Angelo’s band whose 14-year-old black son, Keyon Harrold Jr., was falsely accused of stealing an iPhone from a white woman at the Arlo Hotel in Soho last September.No explanation was needed as this went down live at the Apollo Theater — the mecca for African-American artists.