getPlaneMetaData method Null safety

Implementation

@override
List<InputImagePlaneMetadata> getPlaneMetaData() {
  final List<InputImagePlaneMetadata> planeData = <InputImagePlaneMetadata>[];
  for (final Plane plane in cameraImage.planes) {
    planeData.add(
      InputImagePlaneMetadata(
        bytesPerRow: plane.bytesPerRow,
        height: plane.height,
        width: plane.width,
      ),
    );
  }
  return planeData;
}