21848 Roll Skia from 99446001182c to f4bda743ff8d (22 revisions) (cla: yes, waiting for tree to go green)

21850 [fuchsia] External view embedder will be shared with platform view (cla: yes, waiting for tree to go green)

21852 Auto detect mode to determine which rendering backend to use. (cla: yes, platform-web, waiting for tree to go green)

21875 Fix typos in FlValue docs (cla: yes, waiting for tree to go green)

21891 Check for null images in ImageFromCompressedData (cla: yes, waiting for tree to go green)

21892 Roll Skia from f4bda743ff8d to f1b53836b705 (21 revisions) (cla: yes, waiting for tree to go green)