Chameleon: Fix display_EndToEnd by checking resolution after apply an EDID

As applying a new EDID, the resolution changes. The test should read
the new resolution again after apply a new EDID.

BUG=chromium:443916
TEST=Ran the display_EndToEnd test on Pit.

Change-Id: I0c18074e5e0c1075afd7e7978029a0dac5e0c5cd
Reviewed-on: https://chromium-review.googlesource.com/236953
Tested-by: Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Wai-Hong Tam <waihong@chromium.org>
Commit-Queue: Wai-Hong Tam <waihong@chromium.org>
1 file changed