33461 Various code cleanup improvements (cla: yes, framework, waiting for tree to go green)

33462 Fix text scaling of strut style (cla: yes, framework)

33463 Pin previous build_daemon (cla: yes)

33466 [flutter_tool] Misc. fixes for Fuchsia (cla: yes, tool)

33467 fixed 33347 fill the gap during performLayout in SliverGrid and Slive… (cla: yes, framework)

33468 Fix a missing_return analyzer error in a code example (cla: yes)

33472 add daemon command to enumerate supported platforms (cla: yes, tool)

33473 fix 23723 rounding error (cla: yes, framework)