Chameleon: Skip the test case of disabling HDCP on CrOS side

This test case is known to be failed. Let's skip this case in order
to uncover other failures.

BUG=chromium:418253
TEST=Ran display_HDCPScreen on Pi.

Change-Id: I395a09545a5137d3382cf17b68731c34e9ce822c
Reviewed-on: https://chromium-review.googlesource.com/241032
Tested-by: Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Hung-ying Tyan <tyanh@chromium.org>
Commit-Queue: Wai-Hong Tam <waihong@chromium.org>
1 file changed