am 76c9d31c: Revert "adding set wallpaper sample code in ApiDemos."

Merge commit '76c9d31ce383cf1f4ef89dd1dae4f751fbb73b9a' into eclair-mr2

* commit '76c9d31ce383cf1f4ef89dd1dae4f751fbb73b9a':
  Revert "adding set wallpaper sample code in ApiDemos."