am 920f2aae: Add the LiveWallpaper sample as prebuilt to the SDK system image.

Merge commit '920f2aaee64cc21f00d712ba17a1dded02ccff6b' into eclair-plus-aosp

* commit '920f2aaee64cc21f00d712ba17a1dded02ccff6b':
  Add the LiveWallpaper sample as prebuilt to the SDK system image.