22770 add file package to deps in prep for glob update (cla: yes, waiting for tree to go green)

22772 Roll Skia from 8d78da910e45 to fd41d878b13d (20 revisions) (cla: yes, waiting for tree to go green)

22776 Roll Skia from fd41d878b13d to 70fe17e12f38 (6 revisions) (cla: yes, waiting for tree to go green)

22778 Roll Dart SDK from 960620d2e811 to 7a2a3968ef53 (12 revisions) (cla: yes, waiting for tree to go green)

22779 [web] Initial rich measurement implementation (cla: yes, platform-web, waiting for tree to go green)