Re: Comand & Conquer Rivals aspect ratio Sony Mobile
EA is not likely to do anything about this, since they have stopped development on this game.
Your best bet is probably to modify the manifest file which Android uses, and/or to install an app with which you can set the resolution/aspect ratio, like the Android Debug Bridge (adb).
Links:
https://stackoverflow.com/questions/43628047/how-to-support-189-aspect-ratio-in-android-apps
