[Feautre]: Modify primitive head to support SUN-RGBD dataset

[encore-zhou]

No description provided.

[codecov]

Codecov Report

Merging #136 into master will increase coverage by 0.33%.
The diff coverage is 61.73%.

@@            Coverage Diff             @@
##           master     #136      +/-   ##
==========================================
+ Coverage   49.80%   50.13%   +0.33%     
==========================================
  Files         164      164              
  Lines       10563    10788     +225     
  Branches     1605     1630      +25     
==========================================
+ Hits         5261     5409     +148     
- Misses       4985     5055      +70     
- Partials      317      324       +7     

Flag	Coverage Δ
#unittests	50.13% <61.73%> (+0.33%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmdet3d/datasets/__init__.py	100.00% <ø> (ø)
mmdet3d/datasets/nuscenes_dataset.py	33.02% <ø> (ø)
mmdet3d/datasets/pipelines/__init__.py	100.00% <ø> (ø)
mmdet3d/datasets/waymo_dataset.py	10.36% <0.00%> (-0.22%)	⬇️
mmdet3d/models/fusion_layers/point_fusion.py	37.62% <ø> (+1.08%)	⬆️
mmdet3d/ops/pointnet_modules/point_sa_module.py	64.78% <ø> (ø)
...et3d/models/roi_heads/mask_heads/primitive_head.py	18.91% <6.89%> (-2.49%)	⬇️
mmdet3d/models/dense_heads/anchor3d_head.py	61.85% <11.11%> (-4.63%)	⬇️
mmdet3d/models/detectors/mvx_two_stage.py	32.11% <33.33%> (+0.16%)	⬆️
mmdet3d/core/bbox/structures/cam_box3d.py	75.67% <61.90%> (-3.22%)	⬇️
... and 27 more

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