By Lane Lambert QUINCY – There he was in Kuala Lumpur, Malaysia, at a lavish reception marking the nation’s 50th anniversary of independence. Britain’s Prince Andrew was seated to his right, Australia’s ambassador to his left, and Brunei’s foreign minister across the table. ”And they were asking me about Muslims in America,” said Imam Talal Eid, recalling the event a month later. The 56-year-old Lebanon native and Quincy resident is fielding such questions more often than ever these days, in farther-flung places. Four months after he became the first Muslim cleric appointed to the high-profile U.S. Commission on International Religious Freedom, he is traveling the globe acting as something of a U.S. ambassador to the Islamic world.