4008 [in_app_purchase] Explanation for casting details to implementations (cla: yes, waiting for tree to go green, p: in_app_purchase)

4009 Separate out the deprecated plugins in README.md (cla: yes)

4010 [camera] Do not trigger flat device orientation on iOS (cla: yes, p: camera, platform-ios)

4011 [shared_preferences] Add iOS unit tests (cla: yes, waiting for tree to go green, p: shared_preferences, platform-ios)

4012 Remove “unnecessary” imports. (cla: yes, waiting for tree to go green)

4014 [flutter_plugin_tools] Simplify filesystem usage (cla: yes)