26596 Fixes handleNavigationMessage in order (cla: yes, waiting for tree to go green, platform-web)

26622 [web canvaskit] fix SkiaObjectBox instrumentation (cla: yes, platform-web)

26626 [web] Allow some more nulls in platform_dispatcher. (cla: yes, waiting for tree to go green, platform-web)

26637 Revert “fuchsia: Delete all the legacy code!” (cla: yes, platform-web, platform-fuchsia)

26638 Revert “fuchsia: Delete all the legacy code! (#26422)” (#26637) (cla: yes, platform-web, platform-fuchsia)

26644 [web] migrate some felt code to null safety (cla: yes, platform-web)