By Nobuhiro Kubo, Hyonhee Shin and Michael Martina TOKYO/SEOUL/WASHINGTON (Reuters) -Russian and Chinese bombers flew joint patrols near Japanese and South Korea air defense zones on Tuesday in a pointed farewell to U.S. President Joe Biden as he concluded a trip to Asia that rankled Beijing. The patrols came hours after Biden angered China by saying he would be willing to respond militarily to defend Taiwan if it came under Chinese attack, and as he discussed responses to Russia’s invasion of Ukraine with leaders of the Quad, which groups the United States with Australia, India and Japan. Jap…