“The Man Who Drove with Mandela” profiles Cecil Williams, a white (and gay) South African theater director and anti-apartheid activist who was arrested with Nelson Mandela in 1962 (the fugitive Mandela was posing as Williams' chauffeur at the time). Corin Redgrave portrays Williams in reenacted “self-reflections.” Directed by Greta Schiller (“Paris Is a Woman”).