Unity and Android Compatibility problem

Hello,

I try to make launcher for android devices using unity. It has to be default launcher for specific device, so device with firmware (including launcher) have to pass Android Compatibilty Test Suite (https://source.android.com/compatibility/cts/index.html) to join to the list of devices supported by the Google Play Store. Problem is that unity applications are blocking some of operating system features concerning the audio and video. I solved audio issues by disabling audio in unity and creating native plugin which plays sounds, but I still have problem with one from video tests. Strictly I have problem with doTestEncodeVirtual test case from android.media.cts.EncodeVirtualDisplayTest test suite (source code of tests is available in the https://android.googlesource.com/). I tested my launcher on several devices (not only on the target device) and I had this problem on each of them, but when I made tests with another launchers (downloaded from store), I didn't have this issue. Also, I tried to launch tests on my other unity applications (including basic app with empty scene only) and this problem still occurs, so I am sure that it is unity configuration problem. Does anybody have any idea or solution for this problem?

best regards, Dominik