That's all well and good, but my app got deleted because they told me an app cannot be a webview of a website.
When I raised an appeal, and proved to them how it was a self contained app, they told me an app cannot be a webview of a website.
When I deleted the website they told me that my app was just a webview of (which it wasn't), and then reappealed, they told me an app cannot be a webview of a website, and deleted my app.
So, the lesson here is: Submitting an app that renders using a webview is a gamble and that Google reviewers don't actually review your app.
Source: worked on supporting this capability.
[1] https://developers.google.com/codelabs/pwa-in-play#0 [2] https://www.youtube.com/watch?v=ddbHp8tGBwQ