Fix YOLOX CI failed

[hhaAndroid]

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Motivation

Fix YOLOX CI failed.

Reslove: #6863

[codecov]

Codecov Report

Merging #6864 (1e94060) into dev-v2.20.0 (1efcc0a) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           dev-v2.20.0    #6864      +/-   ##
===============================================
- Coverage        62.02%   62.01%   -0.02%     
===============================================
  Files              323      323              
  Lines            25744    25744              
  Branches          4363     4363              
===============================================
- Hits             15969    15965       -4     
- Misses            8928     8930       +2     
- Partials           847      849       +2     

Flag	Coverage Δ
unittests	61.99% <ø> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
mmdet/core/bbox/samplers/random_sampler.py	75.00% <0.00%> (-5.56%)	⬇️
mmdet/core/post_processing/bbox_nms.py	74.62% <0.00%> (-4.48%)	⬇️
mmdet/core/bbox/assigners/max_iou_assigner.py	73.68% <0.00%> (+1.31%)	⬆️

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