SEVERAL times two weeks ago Jakarta was the scene of a temporary time warp. First a parade of vintage carsincluding a 1935 Austin, a Chevrolet Bel Air, a 1925 Chevrolet as well as a Le Baron with a presidential number platewound its way along the main thoroughfare of Central Jakarta. Then a week later, a convoy of cars that served as the official cars of Indonesias first President Sukarno were driven around the Istana Merdeka palace. These cars,