53944 [flutter_tools] update asset manifest to use package_config instead of package_map (cla: yes, tool)

53945 [Material] Add focus, highlight, and keyboard shortcuts to Slider (cla: yes, f: material design, framework, waiting for tree to go green)

53949 [flutter_tools] also listen to web stderr stream (cla: yes, tool)

53951 Revert “[flutter_tools] update to package vm_service: electric boogaloo” (cla: yes, team, tool)

53952 [web] Fix race condition in widget benchmarks (cla: yes, platform-web, team)

53954 [gen_l10n] Fix plural parsing for translated messages (a: internationalization, cla: yes, team, tool, waiting for tree to go green)