am 949ffa3d: am 11cff8cd: Merge change Ie211adae into eclair

Merge commit '949ffa3da5231772425c3bde50caeab6c4d08ec5' into eclair-mr2-plus-aosp

* commit '949ffa3da5231772425c3bde50caeab6c4d08ec5':
  Add a way for wallpapers to know the delta between virtual screens.