Make SurfaceViewRenderer/TextureViewRenderer open (#137)

@@ -6,7 +6,7 @@ import android.view.View
 import io.livekit.android.room.track.video.ViewVisibility
 import io.livekit.android.room.track.video.ViewVisibility
 import org.webrtc.SurfaceViewRenderer
 import org.webrtc.SurfaceViewRenderer
 
 
-class SurfaceViewRenderer : SurfaceViewRenderer, ViewVisibility.Notifier {
+open class SurfaceViewRenderer : SurfaceViewRenderer, ViewVisibility.Notifier {
     constructor(context: Context) : super(context)
     constructor(context: Context) : super(context)
     constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
     constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
 
 

@@ -28,7 +28,7 @@ import java.util.concurrent.CountDownLatch
 /**
 /**
  * Display the video stream on a TextureView.
  * Display the video stream on a TextureView.
  */
  */
-class TextureViewRenderer : TextureView, SurfaceHolder.Callback, TextureView.SurfaceTextureListener, VideoSink,
+open class TextureViewRenderer : TextureView, SurfaceHolder.Callback, TextureView.SurfaceTextureListener, VideoSink,
     RendererEvents, ViewVisibility.Notifier {
     RendererEvents, ViewVisibility.Notifier {
     // Cached resource name.
     // Cached resource name.
     private val resourceName: String
     private val resourceName: String