Red On Red by Edward Conlon (Spiegel & Grau, $26.00, 442 pages, ISBN 978-0-385-51917-5) If Woody Allen had a Harvard degree and was a New York City detective who wrote a novel, Red on Red  by Edward Conlon would be it.  Red on Red has more angst than a busload of teen-agers have drama.  It’s a police procedural with psychological insights into the daily life of a cop, down