A laptop computer containing floor plans for Trump Tower, information about the Hillary Clinton email investigation and other national security information was stolen from a Secret Service agent's vehicle in Brooklyn, police sources told the Daily News. Authorities have been frantically searching for the laptop since it was stolen Thursday morning. Some items stolen along with the laptop — including coins and a black bag with the Secret Service insignia on it — were later recovered. But the laptop, along with other documents described as "sensitive," were still being sought. The thief stepped out of a car, possibly an Uber, on a street in Bath Beach and stole the laptop from the agent's vehicle, which was parked in the driveway of her home. He was then seen on video walking away from the scene…