62553 After cleaning up 812 warnings: Make warnings fatal in dartdocs (cla: yes, framework, team, waiting for tree to go green)

62582 Random unresolved doc reference fixes I missed before (a: internationalization, a: tests, cla: yes, f: material design, framework, waiting for tree to go green)

62587 Reland “remove usage to applyTextScaleFactorToWidgetSpan” (cla: yes, framework)

62588 Build routes even less. (cla: yes, framework, severe: API break, waiting for tree to go green, will affect goldens)

62601 Use OverflowBar instead of ButtonBar in TimePicker (cla: yes, f: material design, framework)

62602 Fix doc warnings for focus code (cla: yes, framework)