SF: Block gpu rendering for virtual display widevine level3

In MPD3 we are using the widevine level3 for secure content
display. And this should applicable only for primary display
not for screen shot or screen recording.

CRs-Fixed: 595469
Change-Id: I99be2d81287ab746d5c4a2375c3106c59e61a8fc
(cherry picked from commit 149007998be338900cc2c56a4c81f865b1db6f2e)