22175 Roll Fuchsia Linux SDK from UKgKCjxSA… to PY5hNI-wY… (cla: yes, waiting for tree to go green)

22179 Split AOT Android Embedder and shell (cla: yes, platform-android, platform-ios, waiting for tree to go green)

22180 Standardize macro names for dartdoc macros (cla: yes, waiting for tree to go green)

22181 Refactor platform message logic (cla: yes, waiting for tree to go green)

22182 [web] Fix for firefox custom clipping (cla: yes, platform-web, waiting for tree to go green)

22188 Roll Fuchsia Mac SDK from xHjtLQPQ5… to ICK_JlnKJ… (cla: yes, waiting for tree to go green)