[FEATURE] Dynamic Webview Loader

[sonicbrigade]

I have an older Frameo Digital Picture frame that I'm trying to get WallPanel running on for Home Assistant. The device allegedy runs Android 8.1, but it's quite barebones. But what it does have is native ADB and Root access via the shell.

I've been working through some directions (https://gist.github.com/ppoffice/9ce9790708eeabbec1281467e25139e4) in an attempt to upgrade the onboard webview, to no avail. 8.x seems to differ enough from the previous versions that it's not as easy. In the comments, someone mentioned a project they have to dynamically load a newer version of webview from the app itself (https://github.com/JonaNorman/WebViewUpgrade)

Ideally this would load off the internal storage rather than download from some rando GitHub repository. With a toggle in settings to pick whether to use the internal or dynamic webview. Not sure if the whole thing would even really be worth pursuing. My Java isn't good enough for me to even be able to tell if that library is viable or not.