Rework the bottom sheet layout process to accomodate the new rounded
corners and be far more efficient.
This removes the weird content layout code and moves it into the inset
code, which not only allows content to show in the corners, but also
allows us to minimize the amount of layouts that we normally perform.
Rework the playback slide up implementation to be more straightfoward.
This is really composed of stylistic improvements, very little in
actual behavior changes. This does re-introduce a regression when
nothing is playing where the scroll position will become off when
rotating, but that desynchronization happens often so unless I were
to completely migrate both the panel and the bar to a view, I don't
really see it as an issue.
Completely refactor PlaybackBarLayout into PlaybackLayout, which now
not only handles the bar behavior but also allows for one to slide
up the bar layout into the full playback layout. This was largely
adapted from umano's AndroidSlidingUpPanel, albeit heavily minified
and mixed with the previous window inset tricks of the previous layout.
There are still some tweaks to be made, but this implementation seems
to be really good.
Change CompactPlaybackFragment into a View. This completely fixes the
issue I tried to band-aid in ae39054. The code is a bit uglier, but
that's tolerable.
Make HomeFragment's AppBarLayout lift when the data scrolls. This
was something I wanted to do initially, but kept running into issues
with. Turns out the addition of my custom AppBarLayout made this pretty
trivial all things considered. The entire app now follows this idiom.
