54902 Paste shows only when content on clipboard (a: text input, cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)

54903 benchmark animation performance of Opacity widget (cla: yes, team)

54908 add benchmark for picture recording (cla: yes, team)

54909 [flutter_tools] fix multiple defines in flutter tooling, web (cla: yes, team, tool)

54912 Move doctor into globals (cla: yes, team, tool)

54916 Convert expression evaluation exceptions to errors (cla: yes, team, tool, waiting for tree to go green)

54918 [flutter_tools] ensure EventPrinter handles a null parent (cla: yes, tool, waiting for tree to go green)