Trebuchet: Notify wallpaper offsets to LWPs

Change-Id: Icca0ba23f674c2b2116f47349e7b3abc62d32c21
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_packages_apps_Trebuchet into cm-10.2