22966 [canvaskit] reuse canvases when window resizes (cla: yes, platform-web)

22968 [web] update browser changing docs (cla: yes)

22972 Roll Fuchsia Mac SDK from xL_mp7rvV… to G_O-vV26O… (cla: yes, waiting for tree to go green)

22973 Roll Fuchsia Linux SDK from mz03TfHP9… to 0kx01Ik6Y… (cla: yes, waiting for tree to go green)

22974 [flutter_releases] Flutter Engine 1.22.5 Cherrypick revert (cla: yes, platform-android, platform-ios)

22975 Implemented FlutterEngineGroup and Spawn API. (cla: yes, platform-ios)