9698 Ensure that platform messages without response handles can be dispatched. (cla: yes)

9707 Revert “Revert “Use track-widget-creation transformer included in the… (cla: yes)

9713 Explain why OpacityLayer has an offset field (cla: yes)

9717 Fixed logLevel filter bug so that filter now works as expected. (#9460) (cla: yes)

9721 Add comments to differentiate two cache paths (cla: yes)

9725 Make the license script compatible with recently changed Dart I/O stream APIs (cla: yes)

9727 Add hooks for InputConnection lock and unlocking (cla: yes)

9730 Fix Fuchsia build. (cla: yes)

9734 Fix backspace crash on Chinese devices (cla: yes)