There's nothing like a chat with 11-year-old "Breaking Dawn — Part 2"actress Mackenzie Foy to brighten your day. As my fellow "Twilight" fans have likely gathered by now via various video interviews with Foy, she is almost too adorable for words; talking about how Robert Pattinson is actually like a dad to her or how she collected lots of money from her castmembers for swearing that she later…