WIP PIE/Expanded Desktop QS Tile

This should enable Pie and expanded desktop mode.

PS2: Builds now! :D Will test in a bit. Feel free to test for me. I feel like this won't even work, hahahaha.
PS3: Fixed a few small things. Give me a while and I will have fixed more.
PS4: STOP NEGLECTING STUFF IN GERRIT THANKS
     Added mdpi pie pngs (simply copied hdpi ones... somebody should resize them)
     Separated pie and expanded desktop toggles
     Fixed expanded desktop System.Setting to toggle actual expanded desktop state

Change-Id: I98a959b8f4a5b7b91fb68936129e90c971a1e02e
Merge "WIP PIE/Expanded Desktop QS Tile" into jb42