28914 Roll Fuchsia Linux SDK from fvDpNa7Tc… to eEt3ktTjq… (cla: yes, waiting for tree to go green)

28915 Roll Fuchsia Mac SDK from zIn8c0_Am… to Lx_DI2yrc… (cla: yes, waiting for tree to go green)

28916 Roll Skia from aaa81ab61e43 to 2dc9c5d98f72 (3 revisions) (cla: yes, waiting for tree to go green)

28917 Roll Wuffs to 600cd96cf47788ee3a74b40a6028b035c9fd6a61 (cla: yes)

28921 Deprecate SplashScreenProvider (platform-android, cla: yes, needs tests)