title: Open app installation page in AppStore or PlayStore
body: <p>I have a paid app in PlayStore (android) and AppStore (iOS). I'm developing a free app which have similar functions as the paid app but with ads banner at bottom and a time limitation when playing. In this free app, there is a button to allow user upgrade/install the paid app, when user click on this button, the app page on PlayStore will be displayed if the free app is playing on an Android device. Otherwise, the app page on the AppStore will be displayed (the free app is playing on an iOS device). How can I do this in CodenameOne?</p>