Switched to capitalized version of ALBUMS to avoid using android:textAllCaps.
The header used in the AlbumsOneFragment to show the album art.
Gave the footer shadow an id.
Specified a height for the shadow.
Moved the register/unregister of the content observer into the onCreate and onDestroy methods. This fixes an error where the user could add a song to a playlist in the NowPlayingActivity while viewing that same playlist in the MainActivity and not see that added song appear in the playlist.