Use Slider and FloatingActionbutton in the playback view. This is not
because I wanted to, but because there were insane bugs on Lollipop
devices that stemmed from them being unable to load complex selector
resources.
Merge the fast scroller back into Auxio once again, albeit this time
it's AFS instead of IndicatorFastScroll. This not only slims down the
implementation but also allows me to stop the scroller from appearing
every time the home view is recreated. All modifications were noted
and attribution is included to abide by the Apache 2.0 license.