By Phil Stewart and Doina Chiacu WASHINGTON (Reuters) -The top U.S. military officer held a virtual meeting with his Chinese counterpart on Thursday, the Pentagon said, in the first such conversation in over a year amid hopes by U.S. officials that it could lead to a broader restoration of ties between the two militaries. The video teleconference followed an agreement between U.S. President Joe Biden and Chinese President Xi Jinping last month to resume military-to-military ties severed by Beijing after then-House of Representatives Speaker Nancy Pelosi visited self-ruled Taiwan in August 2022…