Frameworks: Lockscreen custom wallpaper (1/2)

kitkat now has code for a custom wallpaper image.

Using that code set a switch case to set the custom background between
  - Custom Wallpaper
  - Default background

This way allows the same overlay shadow thats set on the keyguard when
its the defualt way.

Change-Id: I98fde63ef9f3c0a5f334cd9a97b237a6f99c57f6
Revert "Frameworks: Lockscreen custom wallpaper (1/2)"

This reverts commit 032650221f8f164b4c5f43d8488e569294faa0fc.
Merge commit 'c3eeb33' into HEAD