22239 [web] Put the paragraph painting logic in the Paragraph class (cla: yes, platform-web)

22240 Remove the metrics task from cirrus. (cla: yes)

22243 Roll Dart SDK from 25ef5dc559cf to 5acb5fcf84cb (4 revisions) (cla: yes, waiting for tree to go green)

22244 Roll Fuchsia Linux SDK from sNx8qabBn… to QqGvMWaYk… (cla: yes, waiting for tree to go green)

22246 Roll Fuchsia Mac SDK from 8SkbMXJJ9… to Pz4ZHZrUp… (cla: yes, waiting for tree to go green)

22247 scenario app: update golden for platform view opacity test  (cla: yes)