The Japanese Obama strides with aplomb into the Hyde Park Hair Salon, the barbershop at 53rd Street and Blackstone Avenue where the real Obama has gotten haircuts for the last 14 years. Two cameramen in dingy sweaters trail behind. He meets Zariff, Obama's personal barber. Zariff -- he goes by just the one name -- is an affable, handsome man with, naturally, impeccable hair. The cameras capture th