Was that Jane Fonda getting a non-fat half-caff soy latte at Starbucks last night? Or Tim Robbins facing off with a beleaguered Hertz employee over their lack of hybrid rentals? Probably not, but they, along with a litany of other Hollywood-types are in town for an anti-war rally set to descend on the Mall Saturday afternoon. They’ll be joined by tens of thousands of protesters from all over the country. On the coattails of the…