TouchExploer computes incorrectly the click location.

If there is accessibilty focus and the user touch explores
location that does not change accessibility focus that is
not in the app window, e.g. system bar, double tap does not
click on the system UI affordance.

bug:17588024

Change-Id: I6c8c0f65b208ae1d3f31d7f06b0721dc223ec19f