am bdbe87d0: am 6e4b7d66: Merge change 24020 into eclair

Merge commit 'bdbe87d0756a54dbc2edd24b75b9cd98cab31442'

* commit 'bdbe87d0756a54dbc2edd24b75b9cd98cab31442':
  Wallpapers: new transitions, hiding when not visible, other cleanup.