ROMControl: Lockscreen Wallpaper

PS2: Consistent Placement
     (Landscape was above text
      color)
     Rebase && as such fix
     layout issues

PS3: Send broadcast when setting/deleting an image.

Change-Id: I19c480ae8149aed87970fa568a852b5495db2c88
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Merge "ROMControl: Lockscreen Wallpaper" into jb-mr2