WASHINGTON, June 11 (Reuters) - The U.S. has added three more companies to a list that bars imports from firms allegedly involved with Uyghur forced labor in China, according to a U.S. government notice posted online on Tuesday. The latest targets include shoe manufacturer Dongguan Oasis Shoes Co, electrolytic aluminum maker Xinjiang Shenhuo Coal and Electricity Co and food processor Shandong Meijia Group Co, also known as Rizhao Meijia Group, the notice from the U.S. Department of Homeland...