73503 Revert “Add BuildContext parameter to TextEditingController.buildTextSpan” (cla: yes, f: material design, framework)

73505 Remove an obsolete comment from pubspec.yaml (cla: yes, team, tool, waiting for tree to go green)

73507 Roll Plugins from d026d07afea2 to 1b7afc52353c (2 revisions) (cla: yes, waiting for tree to go green)

73508 Build iOS apps using Swift Packages (cla: yes, d: examples, platform-ios, t: xcode, team, tool, waiting for tree to go green)

73509 Migrate missed sample code to NNBD (cla: yes, f: material design, framework, waiting for tree to go green)