76382 Add sharding options to test command line (cla: yes, tool, waiting for tree to go green)

76385 Revert “Roll Engine from 6993cb229b99 to c217d9d06e4f (60 revisions)” (cla: yes, engine)

76387 Refactor tabbar code sample (cla: yes, d: api docs, documentation, f: material design, framework, waiting for tree to go green)

76392 [Fonts] Make it possible to run update_icons in google3 (cla: yes, team)

76394 Reland “Roll Engine from 6993cb229b99 to c217d9d06e4f (60 revisions) (#76352)” (cla: yes, engine, team)