23654 Roll Skia from 92969f265686 to d8e9436a78bf (6 revisions) (cla: yes, waiting for tree to go green)

23655 Implement handling of framework-handled key events (cla: yes, waiting for tree to go green)

23656 Reland - bump fuchsia toolchain to clang 12 (cla: yes)

23657 Roll Skia from d8e9436a78bf to 0e4a29af9db2 (6 revisions) (cla: yes, waiting for tree to go green)

23659 [web] Reland: Enable the new rich paragraph implementation (cla: yes, platform-web, waiting for tree to go green)

23662 Add winuwp as one of the choices in --target-os. (cla: yes)