Add support for Android 12+ dynamic colors

[TadaCZE]

This pull request adds three Monet themes for a light, a dark and a system dependent theme. (tested on a real device for both dark and light mode)

[TadaCZE]

Okay, will try that!

[Julow]

I've changed the dark theme as I suggested earlier and it looks like this:

Many thanks for your work :) I'll merge this now, feel free to make improvements with subsequent PRs.