Eight years ago, a 16-year-old Auliʻi Cravalho stepped into the role of Moana, Disney's Polynesian princess. Now 24, she's back for "Moana 2, " a sequel that builds on Moana's self-discovery. Cravalho relates to Moana's journey, having looked up to another Disney hero, Mulan, who inspired her through her mix of Asian and Pacific Islander heritage. Just like Mulan, Mo...