72788 [State Restoration] Scaffold.drawer and Scaffold.endDrawer (a: state restoration, cla: yes, f: material design, framework, waiting for tree to go green)

72794 [NNBD] Migrate sample code pt 1 (a: null-safety, cla: yes, f: material design, framework, waiting for tree to go green)

72798 [NNBD] Migrate sample code pt 2 (a: null-safety, cla: yes, f: material design, framework, waiting for tree to go green)

72833 Fix scrollbar configuration for hover events (a: desktop, cla: yes, f: material design, f: scrolling, framework, platform-web, waiting for tree to go green)