[Wi-Fi] Fix Hidden network option scrolls to bottom problem

Should not scroll to bottom since Hidden network option
is not at the bottom most.

Bug: 148036155
Test: manual
      Wi-Fi Setings -> Add network -> Advanced options ->
      click 'Hidden network' Yes -> should not scroll to bottom.
Change-Id: I6511f75441ebad62e2c28df76a39d702d78898a6