Last month, Cristiano R. Amon, the amiable young chief executive of Qualcomm, took the stage at the 2023 China Development Forum, an annual gathering of multinational CEOs and government officials in Beijing. The American business community — wary of awkward optics during a time of grim congressional hearings, industrial sanctions and exploding spy balloons — largely kept their heads down at the press-heavy gathering. But Amon, beaming in a sponge-yellow tie, sounded a decidedly upbeat note