70808 Migrate template to Gradle 6.7 and AGP 4.1.0 (a: accessibility, cla: yes, d: examples, team, tool)

70834 Fix error message typo (cla: yes, tool, waiting for tree to go green)

70847 Ensure attaching to an application with an existing DDS instance is not treated as a fatal error (cla: yes, team, tool)

70853 [flutter_tools] skip ck restart on all platforms (cla: yes, tool, waiting for tree to go green)

70863 [flutter_tools] remove globals from flutter web platform (cla: yes, tool)

70865 [flutter_tools] wire up alternative invalidation strategy to features (cla: yes, tool)

70874 flutter_tools: refactor CreateCommand. (cla: yes, tool, waiting for tree to go green)