The lunatic accused of randomly shoving a Big Apple straphanger onto Manhattan subway tracks Tuesday afternoon was charged with attempted murder.Kamel Hawkins, 23, was also charged with assault after he allegedly pushed a complete stranger onto the tracks at the 18th Street station shortly after 1:30 p.m., according to police and the sources.The terrifying ordeal, which was captured on chilling video footage obtained by The Post, showed the hooded brute roaming the edge of the platform while the victim appeared to be looking at his phone as the train pulled into the station.Without warning, the suspect pushed the man onto the tracks, with the unsuspecting straphanger disappearing under the train.The victim, an unidentified 45-year-old man, was struck by an incoming 1 train and miraculously survived the harrowing afternoon assault with just a head injury, cops said....