am 11cff8cd: Merge change Ie211adae into eclair

Merge commit '11cff8cd30f03b5adb137e985532543da5e960c4' into eclair-plus-aosp

* commit '11cff8cd30f03b5adb137e985532543da5e960c4':
  Add a way for wallpapers to know the delta between virtual screens.