18845 Roll Fuchsia Linux SDK from 9-PNW… to hIXuO… (cla: yes, waiting for tree to go green)

18847 Roll Skia from 59f31b143ccd to 288ecf60bde8 (14 revisions) (cla: yes, waiting for tree to go green)

18849 Add RAII wrapper for EGLSurface (cla: yes, platform-android)

18850 Make rasterizer screenshot work with gl_context_switch (cla: yes)

18851 Roll Skia from 288ecf60bde8 to 9f7485b4bbeb (7 revisions) (cla: yes, waiting for tree to go green)

18852 null-annotate remaining engine code (cla: yes)