In a bold, history-making move, the Disney Channel’s “Andi Mack” will kick off its second season by revealing one of its principal characters to be gay. The coming-of-age series, which debuted in April, follows the adventures of Andi Mack (Peyton Elizabeth Lee) and her pals, Buffy Driscoll (Sofia Wylie) and Cyrus Goodman (Joshua Rush) as they navigate adolescence.