24674 Roll Fuchsia Mac SDK from 7jkJkkEng… to kLoBz4ZY4… (cla: yes, waiting for tree to go green)

24675 Declare a constant for the bit index of the force_strut_height flag value (cla: yes, waiting for tree to go green)

24676 Roll Dart SDK from 632ae0dee554 to d3320177ee9a (1 revision) (cla: yes, waiting for tree to go green)

24677 [Windows] Hide Win32 API of the keyboard system behind ifdef (cla: yes)

24678 Reverts Dart to aa0fea71185b6c3a763ff3875ea0973a6729a04d (cla: yes)