3824 Update integration_test README  (cla: yes)

3895 [shared_preferences] Fix possible clash of string with double entry (cla: yes, waiting for tree to go green, p: shared_preferences, platform-android)

4047 [flutter_plugin_tool] Add support for building UWP plugins (cla: yes)

4059 [camera] android-rework part 9: Final implementation of camera class (cla: yes, p: camera, platform-android)

4082 Support Hybrid Composition through the GoogleMaps Widget (cla: yes, p: google_maps_flutter)

4093 [in_app_purchase]IAP/platform interface add cancel status (cla: yes, waiting for tree to go green, p: in_app_purchase)