Sherilyn McCoy has been appointed chief executive officer of Avon Products, Inc., effective April 23. Ms. McCoy will also serve as a director on Avon’s board. Current chairman and chief executive officer, Andrea Jung, will become executive chairman.   Ms. McCoy joins the company from Johnson & Johnson, where she spent the past three decades, most recently serving as vice chairman of J&J’s pharmaceutical, consumer, corporate office of science and technology, and information technology div...