Since her early days entertaining “straight Republican white women” in Orange County living rooms, wayward Southern belle Dixie Longate—an over-the-top drag character created by writer/actor Kris Andersson—has earned comparisons to Dame Edna and emerged as an unlikely ambassador for Orlando-based Tupperware Brands Corp. Putting an unapologetically trashy spin on the Tupperware-party format, Andersson’s signature show (touring…