81155 Revert “[RenderEditable] Dont paint caret when selection is invalid” #81076 (team, framework, f: material design, cla: yes)

81226 Revert “Migrate to ChannelBuffers.push” (a: tests, team, framework, f: material design, a: accessibility, cla: yes, f: cupertino, d: examples)

81228 Support notched BottomAppbar when Scaffold.bottomNavigationBar == null (framework, f: material design, cla: yes)

81235 Migrate to ChannelBuffers.push (a: tests, team, framework, f: material design, a: accessibility, cla: yes, f: cupertino, d: examples, waiting for tree to go green)

81241 Use ColorScheme.primary (not secondary), ExpansionTile expanded color (framework, f: material design, cla: yes)