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

65188 Revert “Roll Engine from 165abef0a2cb to e979c29a2a50 (42 revisions)” (cla: yes, engine)

65271 Cherry pick engine #20983 (cla: yes, engine)

65386 Flutter 1.22 candidate.10 (cla: yes, engine, f: material design, framework)

65513 Use cherry-pick engine 76240869bda39bb256bc061c9c8d7a81b13b8dae (cla: yes, engine)