77454 Fix a legacy TODO (a: tests, cla: yes, framework, team, waiting for tree to go green)

77825 Make LocalFileComparator.compare easier to override (a: tests, cla: yes, framework, waiting for tree to go green)

77837 non-breaking changes recommended by prefer_mixin lint (a: tests, cla: yes, f: material design, framework, team, waiting for tree to go green)

77850 [flutter_releases] Flutter 2.0.2 Stable Framework Cherrypicks (a: tests, cla: yes, engine, f: cupertino, f: material design, framework, team, tool)

78055 [integration_test] delay for at least one frame timing. (a: tests, cla: yes, framework, waiting for tree to go green)