am c13fbca9: reconcile main tree with open-source eclair

Merge commit 'c13fbca985b333cfb09d2b29875b36594dd44d64' into eclair-plus-aosp

* commit 'c13fbca985b333cfb09d2b29875b36594dd44d64':
  Add uses-feature for live wallpaper sample.
  android-2.1_r1 snapshot