Function devices::virtio::gpu::build

fn build(
    display_backends: &[DisplayBackend],
    display_params: Vec<GpuDisplayParameters>,
    display_event: Arc<AtomicBool>,
    rutabaga: Rutabaga,
    mapper: Arc<Mutex<Option<Box<dyn SharedMemoryMapper>>>>,
    external_blob: bool,
    fixed_blob_mapping: bool,
    udmabuf: bool
) -> Option<VirtioGpu>

Initializes the virtio_gpu state tracker.