am 2321ba48: am b49dd835: Adding wallpaper sample in ApiDemos.

Merge commit '2321ba48baed1638a71ec8c7b1d6f9d79e3e9f83' into eclair-mr2-plus-aosp

* commit '2321ba48baed1638a71ec8c7b1d6f9d79e3e9f83':
  Adding wallpaper sample in ApiDemos.