Support WebAPK

[pocmo]

Meta: #1819
User Story: mozilla-mobile/reference-browser#300

Chrome automatically generates and installs a special APK of your app. We sometimes refer to this as a WebAPK. Being installed via an APK makes it possible for your app to show up in the app launcher, in Android's app settings and to register a set of intent filters.

https://developers.google.com/web/fundamentals/integration/webapks

It's unclear at this point how we can make use of this.

┆Issue is synchronized with this Jira Task

[igalic]

would it be possible or sensible to duplicate what chrome / android does?

[hexandcube]

Why was this closed without a reason?

[Amejia481]

I think there are some limitations that don't allow us to support the feature see mozilla-mobile/fenix#10038 (comment)

[hexandcube]

Oh, ok. I hope that this will change, because it's unacceptable for Google to keep other browsers from using WebAPKs on Android.