setupView method
Implementation
@override
Future<void> setupView(int platformViewId, int nativeViewPtr) async {
_platformViewId = platformViewId;
_viewHandle = nativeViewPtr;
if (_platformViewId != kInvalidPlatformViewId) {
await addPlatformRenderRef(_platformViewId);
}
await rtcEngine.globalVideoViewController
?.setupVideoView(nativeViewPtr, canvas, connection: connection);
}