90142 Use report_lines flag in flutter coverage (tool, cla: yes)

90227 Some test cleanup for flutter_tools. (a: text input, team, tool, cla: yes, waiting for tree to go green)

90288 Fix Dart plugin registrant interaction with ‘flutter test’ (tool, cla: yes)

90304 Migrate iOS project to Xcode 13 compatibility (team, platform-ios, tool, cla: yes, d: examples, waiting for tree to go green, t: xcode)

90394 Do not retry if pub get is run in offline mode (tool, cla: yes, waiting for tree to go green)

90417 Fix an unnecessary_import analyzer error in the skeleton app template (tool, cla: yes)