59219 Typo fixing sweep through packages/flutter. (a: accessibility, cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)

59514 Replace collection’s SetEquality with flutter’s own (cla: yes, f: cupertino, framework, waiting for tree to go green)

59561 Revert “Modernize selection menu appearance” (a: internationalization, cla: yes, f: cupertino, f: material design, framework)

59617 Reland modernize selection menu appearance (a: accessibility, a: internationalization, cla: yes, f: cupertino, f: material design, framework, team, waiting for tree to go green)

59870 Revert “Deprecate WhitelistingTextInputFormatter and BlacklistingTextInputFormatter” (a: tests, cla: yes, f: cupertino, f: material design, framework, team)