framework/base: Fix touch failure during video and incoming call.

Issue: Play a video File. Make a call to the test device , we
       see an incoming call notification. When we try to dismiss
       or accept call by touch the buttons of notification the
       touch is not accepted first time, but responds second time.

Fix: The fake window is created when video playing which is
     taking the input events. We must not create this if a HeadsUp
     notification is displayed.

Change-Id: Ib02b2065ff328aa9609f5b5a243274264b826e2f
CRs-Fixed: 720042