8170 Bugfix: Prevent crash when responding to a platform message after FlutterJNI detaches from native. (cla: yes)

8171 Add docs for helpful commands to fix format (cla: yes)

8172 Add frame and target time metadata to vsync events and connect platform vsync events using flows. (cla: yes)

8174 [scenic][SCN-1054] Move back off of SetTranslationRH (cla: yes)

8175 Keep overlays_gr_context_ in sync with the overlay surface (cla: yes)

8180 Fix log level typo from ERROR to INFO (cla: yes)

8181 Fix include of libzx. (cla: yes)

8182 Ensure that Picture::RasterizeToImage destroys Dart persistent values on the UI thread (cla: yes)