You can't publish an app or get public URL for your app, unless you don't add this things in your app.
1. You need to add a high-res icon. [English (United States) – en-US]
2. You need to add a feature graphic. [English (United States) – en-US]
3. You need to add at least 2 non-Android TV screenshots. [English (United States) – en-US]
4. You need to select a category.
5. You need to add a short description. [English (United States) – en-US]
6. You need to add a full description. [English (United States) – en-US]
7. You need to upload an APK for this application.
8. You need to target at least one country.
9. You need to enter a privacy policy URL.
10. You need to make your application free or set a price for it.
11. You need to declare whether or not your application contains ads.
12. Your app is missing a required content rating. Go to your app's Content Rating page and complete a rating questionnaire.
Have you seen the 7th point? It's necessary to upload apk, then you can publish the app and will get the URL.