26769 Fix JSON map type declaration for SystemChrome.setApplicationSwitcherDescription arguments (cla: yes, waiting for tree to go green, platform-web)

26776 [canvaskit] Only check missing glyphs against fallback fonts once per frame (cla: yes, platform-web)

26783 Replace flutter_runner::Thread with fml::Thread (cla: yes, platform-web, platform-fuchsia, needs tests)

26785 Surface frame number identifier through window (cla: yes, waiting for tree to go green, platform-web)

26811 [web] Render RTL text correctly (cla: yes, platform-web)

26820 [canvaskit] Fix bug where empty scene doesn’t overwrite contentful scene (cla: yes, platform-web)