A man who was shot and injured by police in a hotel room in Old Bridge after he allegedly stabbed a woman had minutes earlier called 911 because he alleged people were threatening him, a court document said. Christopher Serrano began to stab the woman in the neck as police entered the room at the Hampton Inn on Spring Valley Road shortly after 2 a.m. Sunday, according to an affidavit of probable cause outlining an attempted murder charge against the 42-year-old Manalapan man. Serrano met the woman at the hotel earlier that night and later became furious when he thought she was talking to anoth…