Dear Hillary Clinton and Dick Cheney: feel free to do embarrassing things in public today. D.C.’s celebrity (and we use that term loosely) photogs are probably following around real celebs — well, at least Angelina Jolie. Yesterday the Examiner gave us the heads-up on a litany of famous-outside-the-Beltway folks traipsing around town this week. So if you’re a little tired of running into Nicolas Cage filming National Treasure 2, keep your eyes peeled for these…