Override certain URLs to launch an app or intent scheme

[dshokouhi]

Summary

Fixes: #569

We now accept app:// and intent:// prefix. When testing in a desktop a blank tab opens so nothing harmful appears to happen elsewhere.

When we detect that a link starts with app:// we will grab the android package and attempt to launch it, if the package does not exist we take the user to the play store (app or website)

When we detect the link starts with intent:// we will parse the Uri with the intent scheme and attempt to launch the activity, if the app is not found we will also take the user to the play store (app or website)

Examples using lovelace weblink entity card type:

This example will launch Twitter if it is installed on the device, otherwise it will open the Google Play store app or website.

- type: weblink
  name: Twitter
  url: "app://com.twitter.android"

This example will launch the barcode scanning app ready to scan via the Intent scheme, if the app is not installed the user will be directed to installing it.

- type: weblink
  name: Scan
  url: "intent://scan/#Intent;scheme=zxing;package=com.google.zxing.client.android;end"

Screenshots

video: https://photos.app.goo.gl/Q93ppHcNB7u8djY97

Link to pull request in Documentation repository

Documentation: home-assistant/companion.home-assistant#450

Any other notes