64737 Flutter Framework Beta 1.21.0-9.2.pre cherry picks (a: internationalization, cla: yes, engine, f: material design, framework, tool)

64840 Make Container always clip a decoration if it has a clip edge (cla: yes, f: cupertino, f: material design, framework)

64855 Fixes issue, ReorderableListView destroys children even if their key-type wasn’t changed (cla: yes, f: material design, framework, waiting for tree to go green)

64915 Prefer moreOrLessEquals over closeTo (cla: yes, f: cupertino, f: material design, framework)

64984 Flutter stable framework 1.20.3 cherrypicks (a: internationalization, cla: yes, d: examples, engine, f: material design, framework, team, tool)