goldfish-opengl: plumb capset_id to creation of virtio-gpu device

The introduction of virtio-gpu context types allows for separation
and composition of previously mixed functionality.  For example,
one may compose with Ranchu and run virgl (crazy example, but it's
theoretically possible) for GL.

BUG=b:202552093
TEST=compile

Change-Id: If6f2a09475d4a4de99b2645a79f88654e35c4523
6 files changed