The Berlin Philharmonic flew into town and one of the first stops by some of its musicians was the gritty streets of the Bowery rather than upscale 57th Street. They sang for about an hour and they included Mozart and American blues at the Salvation Army in Chinatown. The space was not that big and spectators were a bit squeezed into the pews of a tiny chapel but they listened to the world-class musicians who…