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 remote-tracking branch 'cyanogen/cm-10.1' into cm-10.1