Merge commit '394ef56df8af1e569458f6159ce79b055bb846ef' * commit '394ef56df8af1e569458f6159ce79b055bb846ef': Revert "adding set wallpaper sample code in ApiDemos."
Merge commit '394ef56df8af1e569458f6159ce79b055bb846ef' * commit '394ef56df8af1e569458f6159ce79b055bb846ef': Revert "adding set wallpaper sample code in ApiDemos."