27489 Roll Dart SDK from 87a4768078b2 to 2abf053a8e9a (1 revision) (cla: yes, waiting for tree to go green)

27490 Roll Skia from 3339e570a14f to 8c3adb8b1adb (3 revisions) (cla: yes, waiting for tree to go green)

27491 Place Emoji fallback font at the front of the list (cla: yes, platform-web)

27492 Roll Fuchsia Linux SDK from dQkk1o8zS… to ufdC-mDPS… (cla: yes, waiting for tree to go green)

27493 Revert dart rolls (cla: yes, waiting for tree to go green)