A uniformed cop accused of raping an East Village woman in her apartment tried to hide from a surveillance camera while using a key to enter her building, sources said yesterday. But what he didn't appear to know was that there was a second camera catching his and his partner's every move before and after the alleged sexual assault, the sources said. The NYPD's Internal Affairs Bureau is investigating a claim that the patrolman raped an intoxicated business executive after the cop and his partner responded to a cabdriver's 911 plea for help with his drunken passenger, the sources said....