Correct fix for #23821

Apart adding import cv2.mat_wrapper adds import cv2.gapi.wip.draw import to cv2/typing/__init__.py

cv2/typing/__init__.py imports after fix:

import cv2
import cv2.dnn
import cv2.gapi.wip.draw
import cv2.mat_wrapper
import numpy
import typing

Pull Request Readiness Checklist

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• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
• The PR is proposed to the proper branch
• There is a reference to the original bug report and related work
• There is accuracy test, performance test and test data in opencv_extra repository, if applicable
  Patch to opencv_extra has the same branch name.
• The feature is well documented and sample code can be built with the project CMake