By DEE-ANN DURBIN and TERENCE CHEA, Associated Press Writers HAYWARD, California (AP) — Robots that can cook — from flipping burgers to baking bread — are in growing demand as virus-wary kitchens try to put some distance between workers and customers. Starting this fall, the White Castle burger chain will test a robot arm that can cook french fries and other foods. The robot, dubbed Flippy, is made