[Feature] Support Charades Dataset

[congee524]

• [x] Charades dataset
• [x] Sample Charades Frames
• [ ] Train & Test
• [x] Unit Test
• [x] Prepare Charades dataset
• [ ] Add Comments

[codecov[bot]]

Codecov Report

Patch coverage: 98.98% and project coverage change: +0.04% :tada:

Comparison is base (6a252b8) 85.19% compared to head (748dadb) 85.24%. Report is 510 commits behind head on 0.x.

Additional details and impacted files

@@            Coverage Diff             @@
##              0.x     #788      +/-   ##
==========================================
+ Coverage   85.19%   85.24%   +0.04%     
==========================================
  Files         130      132       +2     
  Lines        9418     9504      +86     
  Branches     1591     1626      +35     
==========================================
+ Hits         8024     8102      +78     
+ Misses        997      992       -5     
- Partials      397      410      +13     

Flag	Coverage Δ
unittests	85.24% <98.98%> (+0.06%)	:arrow_up:

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

Files Changed	Coverage Δ
mmaction/datasets/pipelines/__init__.py	100.00% <ø> (ø)
mmaction/datasets/charades_dataset.py	98.27% <98.27%> (ø)
mmaction/datasets/__init__.py	100.00% <100.00%> (ø)
mmaction/datasets/pipelines/loading.py	89.90% <100.00%> (-0.20%)	:arrow_down:
mmaction/models/recognizers/audio_recognizer.py	62.50% <100.00%> (ø)
mmaction/models/recognizers/base.py	69.01% <100.00%> (+0.63%)	:arrow_up:
mmaction/models/recognizers/recognizer2d.py	90.24% <100.00%> (ø)
mmaction/models/recognizers/recognizer3d.py	96.29% <100.00%> (ø)

... and 34 files with indirect coverage changes

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[congee524]

Would you please update the data preprocessing part, so it would be easier to check the correctness of the codes.

The preprocessing script hasn't been implemented yet. I use the slowfast annotations file here

[congee524]

kindly ping :p @dreamerlin