42008 Restructure ProjectFileInvalidator.findInvalidated a bit (cla: yes, tool)

42015 Fix local test failures in flutter_tools (cla: yes, tool, waiting for tree to go green)

42016 [flutter_tool] Re-work analytics events to use labels and values (cla: yes, tool)

42022 Fix smoke test (cla: yes)

42025 Localization refresh (a: internationalization, cla: yes, f: cupertino, f: material design, framework)

42026 Stop leaking iproxy processes (cla: yes, tool)

42028 Make ProjectFileInvalidator.findInvalidated able to use the async FileStat.stat (cla: yes, tool)