Fix calculateSystemGestureExclusion

This CL sets the correct values to mSystemGestureFrameLeft and
mSystemGestureFrameRight.

The regression was casued by commit:
6b2391ae

Bug: 234093736
Test: Add local logs to check if values in both system gesture frames
      are expected.
Change-Id: I1fb2fa7a89e35e2baa5766af908359a711bcc487