Helena Bonham Carter is defending two of the most polarizing celebrities in her life, J.K. Rowling and Johnny Depp. She tackled remarks from the “Harry Potter” scribe viewed by many as transphobic, along with her “Sweeney Todd” co-star’s defamation trial against ex-wife Amber Heard. “I think she has been hounded,” Bonham Carter said of Rowling in a recent interview with the Times of London. Bonham Carter voiced her support for Rowling being “allowed her opinion, particularly if she’s suffered abuse.” The actress, who played Bellatrix Lestrange in the “Potter” films, said that the “horrendous” …