59128 Fix typo in scroll_aware_image_provider.dart (cla: yes, framework, waiting for tree to go green)

59156 Add sample code to PositionedTransition (cla: yes, framework)

59160 Remove unused import which shares prefix name with a used import. (a: internationalization, cla: yes, f: cupertino, f: material design)

59162 Rebuild SliverAppBar when forceElevated changes (cla: yes, f: material design, framework, waiting for tree to go green)

59175 [flutter_tools] remove globals from proxy validator (cla: yes, tool)

59184 [flutter_tools] remove globals from compilers (cla: yes, team, tool)