The Oakland bandit who swiped Mayor Barbara Lee’s black SUV from a City Hall parking lot had been “squatting” at the deserted government building before breaking into her office to swipe the keys, The California Post has learned. A suspect in the brazen theft of the mayor’s $75,000 Ford Expedition set up camp in the Oakland city attorney’s office — going unnoticed by the city’s highly-paid security firm, ABC Security Services, and employees who are known to work from home, a source familiar with the investigation told The Post.