Added a custom app APK to the app list. Trying to add it to Android Multi-App Kiosk Mode, app type Google Play Apps, but its not showing in the list. When I paste the Identifier into the kiosk app list, it doesn't add it when I click add. Documentation says custom apps should show in the Google Play Apps Kiosk mode. What am I missing to get the custom app to show in Multi-App Kiosk Mode?