31693 Adds a note to Radio’s/RadioListTile’s onChange (cla: yes, d: api docs, f: material design, framework)

31696 Attempt to reduce usage of runtimeType (cla: yes, framework)

31736 update packages and unpin build (cla: yes, tool)

31757 Make FlutterProject factories synchronous (cla: yes, tool)

31759 Remove deprecated commands (cla: yes, tool)

31761 Support clipBehavior changes in hot reload (cla: yes, framework)

31762 Remove trailing whitespace from README template (cla: yes)

31765 Initial sketch of tools testbed (cla: yes, tool)

31771 Fix a simple typo (cla: yes)