Revert "remove MiWallpaper"

This reverts commit f6099c9c986b48c2b9df63b91dacdae229bd4670.

Change-Id: I74d11c5e3d4ea5cf467c253ecb9ac0c34bbd884c
Add O2O

Change-Id: I61e4b62e6a29d36b91a3804cd776f1bf2fb6dfba