Merge commit 'eac4222f7f30bf1df14b223cf62e594914dd32d4' * commit 'eac4222f7f30bf1df14b223cf62e594914dd32d4': Add a way for wallpapers to know the delta between virtual screens.
Merge commit 'eac4222f7f30bf1df14b223cf62e594914dd32d4' * commit 'eac4222f7f30bf1df14b223cf62e594914dd32d4': Add a way for wallpapers to know the delta between virtual screens.