NavigationBarView: Set buttonWithTagVisibility for Search

* a67d3509 set this correctly for home, recent, and back, but neglected Search which leaves it
     visible on secure lockscreen during pin/password entry.
* Set the button with tag visibility so it is hidden with the rest of the buttons

OSS-JIRA : NIGHTLIES-1476

Change-Id: I64b7ca216e04ae2509fa8048544ab3b47aef32ab
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>