By Noel Randewich SAN FRANCISCO (Reuters) – Qualcomm Inc executives showed off robots made with smartphone technology at an annual developer conference on Thursday, but they steered clear of talking about China, a key growth market where the chipmaker is entangled in an antitrust investigation. With an explosion in smartphones in recent years tapering off, Qualcomm and handset manufacturers are eager to show consumers and investors that they have more innovation in store to drive demand for new devices. …
