Round off the styling for the app by adding a background image for the app.
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/30498681-your-first-kotlin-android-app-polishing-the-app/lessons/16
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/30498681-your-first-kotlin-android-app-polishing-the-app/lessons/16