CellBroadcast: Disable App links on wifi-only devices

PatchSet 2: Remove unnecessary check

Change-Id: I359b5fef2932dfa072b72384edf9ba730a1f71a1
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_packages_apps_Settings into jb-mv