Don't dismiss keyboard if pressing 'Go' when no query.

The previous change didn't resolve the problem in the case when we navigate back to QSB after performing one search; the mTookAction flag is sticky for the whole QSB session.

Bug: http://b/issue?id=2466682
Change-Id: I266b6706ef534a8cebfd8c7c4f3afdd5388cfb31
1 file changed