(Reuters) – U.S. President Joe Biden and Chinese President Xi Jinping spoke on a video call about Russia’s invasion of Ukraine, with Chinese media citing Xi as saying that such conflicts were in no-one’s interests. Washington seeks to isolate Moscow from the one big power that has yet to condemn its invasion of Ukraine. CIVILIAN TOLL * Ukraine’s food supply chains are breaking down and the conflict is leading to “collateral hunger” across the world, U.N. food aid agency warned. * Ukrainian President Volodymyr Zelenskiy said rescue work continued to save hundreds of people still believed to be …