39156 Added Scaffold.extendBodyBehindAppBar (cla: yes, f: material design, framework)

39157 Use new Maven artifacts from Gradle (cla: yes, t: gradle, tool)

39160 Revert “echo error messages to stderr” (cla: yes, waiting for tree to go green)

39189 fix source map loading and service protocol for flutter web (cla: yes, tool)

39195 respect reversed scroll views (cla: yes, framework)

39196 Added a Driver wait condition for no pending platform messages (a: tests, cla: yes, framework)

39198 Docs (a: tests, cla: yes, f: material design, framework)

39214 Place terminalUi flag on terminal interface (cla: yes, tool)