By Chayut Setboonsarng, Liangping Gao and Trevor Hunnicutt BANGKOK/BEIJING/WASHINGTON (Reuters) -Top Chinese and U.S. officials held candid talks in Bangkok aimed at lowering tensions between the superpowers on Taiwan and other subjects, ahead of an expected springtime call between President Joe Biden and Chinese leader Xi Jinping. U.S. National Security Advisor Jake Sullivan pressed Chinese Foreign Minister Wang Yi to use his country’s diplomatic influence to convince Iran to curtail support for Houthis attacking Red Sea merchant vessels, according to a senior Biden administration official. T…