Settings: Remove "Learn More" clickable text if not overlaid.

  If the "Learn More" textview's target click intent url is
  not overlaid, settings will throw an NPE. Remove the text
  if not overlaid.

Change-Id: Ib80547a90b8c97485db2529b79172f7c461649c0
TICKET: CYNGNOS-2173
(cherry picked from commit c9e29de3)