65422 [flutter_tools] only lock if an upgrade/download will be performed (linux/macos) and output building messages to stderr (cla: yes, team, tool)

65508 fix an issue where raw json output is written to IDE clients (cla: yes, tool, waiting for tree to go green)

65509 Sort generated plugin file content by plugin name (cla: yes, tool, waiting for tree to go green)

65568 Remove unused ‘dart:async’ imports. (a: accessibility, a: internationalization, a: tests, cla: yes, f: cupertino, f: material design, framework, team, tool)

65623 Remove invalid assert in daemon (cla: yes, tool, waiting for tree to go green)

65696 Minor Windows app template updates (cla: yes, tool, waiting for tree to go green)