gfx: add GfxBlendBuffer

src/ifs/ext_image_copy/ext_image_copy_capture_frame_v1.rs

@@ -245,6 +245,7 @@ impl ExtImageCopyCaptureFrameV1 {
                 true,
                 false,
                 jay_config::video::Transform::None,
+                None,
             )
         });
     }

src/ifs/jay_screencast.rs

@@ -202,6 +202,7 @@ impl JayScreencast {
                     false,
                     false,
                     Transform::None,
+                    None,
                 );
                 match res {
                     Ok(_) => {