9632 Added Doxyfile. (cla: yes)

9633 Cherry-pick fix for flutter/flutter#35291 (cla: yes)

9634 Roll Dart to 67ab3be10d35d994641da167cc806f20a7ffa679 (cla: yes)

9636 Added shebangs to ios unit test scripts. (#9464) (cla: yes)

9637 Revert “Roll Dart to 67ab3be10d35d994641da167cc806f20a7ffa679 (#9634)” (cla: yes)