Copy the save file to your Android device. Using a file manager on the device, rename the file to "user" and move it to "/data/data/com.vectorunit.silver.<app-store>/files/". Launch the game and destroy all fountains on Fountain Park; you should now get the final decal, completing the 100% game completion statistic. Finally, copy the file to a convenient location in internal storage (ex. /sdcard/Download) and move it back to the save location on your PC.