By David Brunnstrom and Idrees Ali WASHINGTON (Reuters) – Australia and United States are determined to “counter destabilizing military activities by the People’s Republic of China”, their defense ministers said after a meeting at the Pentagon at the start of annual talks between the allies. U.S. Defense Secretary Lloyd Austin met with Australia’s Defence Minister Richard Marles in Washington on Monday as part of the annual AUSMIN talks that on Tuesday included the two nations’ foreign ministers. Britain’s defence minister, Ben Wallace, will also attend the first in-person meeting of AUKUS min…