78581 leading distribution docs (cla: yes, framework, waiting for tree to go green)

78584 Revert “Fix a legacy TODO” (a: tests, cla: yes, framework, team)

78588 Automatically applying Scrollbars on desktop platforms with configurable ScrollBehaviors (a: desktop, cla: yes, customer: crowd, f: cupertino, f: material design, framework, platform-web, severe: API break, severe: new feature, waiting for tree to go green)

78630 Revert “Fix a legacy TODO (#77454)” (#78584) (a: tests, cla: yes, framework, team)

78633 Fixes AlertDialog and SimpleDialog to not merge their content semantics (cla: yes, f: material design, framework, waiting for tree to go green)