Make MediaDrm device-aware

Cap DRM sessions at max. SW_SECURE_CRYPTO security level for sessions opened by
applications that are currently visible on a Virtual Device.

Goal is to ensure applications do not get misled that full hw backed DRM is available
(which it generally would be on the host device). As virtual devices
operate with virtual displays hw backed DRM will not be available and we now report
it as such for applications.

Bug: 306374719
Test: atest VirtualDeviceDrmTest
Change-Id: I55acb7d15e19611a702492c71dccce2f973fd37c