4391 [google_sign_in] Use a transparent image as a placeholder for the GoogleUserCircleAvatar (cla: yes, waiting for tree to go green, p: google_sign_in, last mile)

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)