Fixing issue with miscalculation in updating container bounds.

- There was an issue with the previous logic where the test of whether
  the search bounds changed would always be false if valid search bounds
  were given.  This in conjunction with the fact that the padding was
  changed to only take the bounds left/right into account, meant that
  the container bounds would not be updated if the search bar bounds
  shifted via the insets.

Bug: 22918919
Change-Id: Ia810ddc7a56eae4afc0c7cd558fa6dc9e8e7a95b