Winnie Madikizela-Mandela, the controversial ex-wife of anti-apartheid icon Nelson Mandela, is featured as a doting and beloved grandmother and materfamilias in “Being Mandela,” a new reality series chronicling the fashion-forward lives of sisters Zaziwe Dlamini-Manaway and Swati Dlamini, the granddaughters of Mr. Mandela, 94, and Madikizela-Mandela, 76.
