4392 [in_app_purchase] Handle restored purchases in iOS example app (cla: yes, waiting for tree to go green, p: in_app_purchase, platform-ios)

4393 [in_app_purchase] Handle PurchaseStatus.restored correctly in example. (cla: yes, waiting for tree to go green, p: in_app_purchase)

4394 [webview_flutter] Fixed todos in FlutterWebView.java (cla: yes, waiting for tree to go green, p: webview_flutter, platform-android)

4395 Add file_selector to the repo list (cla: yes, waiting for tree to go green)

4396 [flutter_plugin_tools] Validate pubspec description (cla: yes, p: camera, p: file_selector, p: plugin_platform_interface, p: espresso, p: wifi_info_flutter)