Fix the case of the missing header.

We should not override the tabs based on the search state now
that they are hidden (but still active) during the animation.

For an explanation of why this fixes the issue, please see
https://b.corp.google.com/issues/247615711#comment15.

Fix: 247615711
Test: Manually with predicted apps being updated every second
(part of the way I found to repro the bug).

Change-Id: I5ba45c42726c34f471a7743c06aecc05c89f6105