Stephen Fry has been described as a “quintessential Englishman” and, thanks to his Cambridge University degree and roles in films such as “Gosford Park” and “Wilde,” he’s got a resumé to prove it. But it turns out his latest role, as Polish Holocaust survivor Edek in the upcoming feature “Treasure,” is closer to home. Premiering at the Berlin Film Festival this month, “Treasure” sees Fry star opposite Lena Dunham (who also executive produced the project) as a father-daughter duo who return to Poland to confront their family’s tragic past. Despite the heavy subject matter — the Julia von Heinz-directed feature...