Finally add tab customization. This implementation is a
bit ugly, but I had to futureproof it for playlists and I'm
planning to clean up a lot of the duplicate code across the app.
This addition notably allows a default tab to be set, which is
something that was widely requested in #12. This UI rework finally
allows it to be added.
Actually bother to add license boilerplate. Even though I've written
the entirety of Auxio, the boilerplate will be under "Auxio Project"
instead, as I don't want to share my real name.
Refactor styles again, this time trying to seperate the more
layout-specific attributes so that layouts become more re-usable.
This also updates the naming conventions of styles.
The plans for widgets have changed somewhat. Instead of 4 or so
variants, there will instead be one unified widget that chooses
different layouts depending on its size. The first one added is the
full widget, which shows more controls as long as theres enough
space.
Modify the minimal wdiget so that it can work on Android 11 and below.
Was not actually that hard, mostly changing layouts around all things
considered. This also splits up the default view and the main widget
views, which makes managing UI state much easier.
