[Feature] Material Design

[Cod3dDOT]

This is an umbrella issue for adding support for Android's Material Design (Version 3).

The solution should: a) make the experience more consistent inside the app b) make the experince more consistent with the proposed Android Design Guidelines c) support XML and incure minimal codebase changes.

TRACKING: [ ] Redesign settings UI [ ] Rewrite Settings UI [ ] Enable Material theming on main screen