29683 Show/hide toolbar and handles based on device kind (a: desktop, a: text input, cla: yes, framework, severe: API break)

29809 Fix text selection toolbar appearing under obstructions (cla: yes, f: cupertino, f: material design, framework)

29954 Cupertino localization step 9: add tests (cla: yes, f: cupertino, framework)

30076 Implements FocusTraversalPolicy and DefaultFocusTraversal features. (a: desktop, cla: yes, framework)

30224 Cupertino localization step 10: update the flutter_localizations README (cla: yes, f: cupertino, framework)

30388 Add hintStyle in SearchDelegate (cla: yes, f: material design, framework)