Javascript Support, better closing of Web popup

Adding JavaScript support to Webview.

There was a bug after about 6 popups from Frigate in a short window, streams would just return a white box. Noticed that connections to the server were still live and ultimately timed out. Added webview.destroy to when the popup closes to kill the connection to the server and it seemed to help with the white box issue.

Support Local HTTP Requests

This APK supports local HTTP requests so you can load images/videos from Frigate.

More info can be found in this post/thread: https://community.home-assistant.io/t/integration-android-tv-live-cam-video-streams-in-a-picture-in-picture-triggered-by-motion-detection-aka-video-doorbell/339759/51?u=desertblade