SystemUI: Add Expanded desktop tile to QuickSettings (2/2)

    * Patch Set 1: initial commit
    * Patch Set 2: change tile title
    * Patch Set 3: change tile title again
    * Patch Set 4: updated to suggested drawable by blunden
    * Patch Set 5: update drawables to fit to the bahavior of
                   the other icons used in QS
    * Patch Set 6: rebase
                   only display tile if feature is enabled
    * Patch Set 7: launch the proper long press activity
    * Patch Set 8: correctly hide tiles if ED or profiles are turned off
		   style fixes

Change-Id: I2273f8f0bdb726ec34f00a6fb205b1bc6e795cfa