am 17d176d8: am ddf157ca: Merge change I5ae73af7 into eclair

Merge commit '17d176d8570f7d76532afee43853339c60fc9850' into eclair-mr2-plus-aosp

* commit '17d176d8570f7d76532afee43853339c60fc9850':
  Don't back up system wallpapers.