feat: Add stats for numner of conference requests.

[bgrozev]

No description provided.

[JonathanLennox]

Make sure to fix the typo in the commit message when you commit.

[codecov]

Codecov Report

Merging #1121 (e940434) into master (067e575) will decrease coverage by 0.20%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1121      +/-   ##
============================================
- Coverage     27.86%   27.67%   -0.20%     
+ Complexity      473      468       -5     
============================================
  Files           128      128              
  Lines          7783     7791       +8     
  Branches       1064     1065       +1     
============================================
- Hits           2169     2156      -13     
- Misses         5342     5364      +22     
+ Partials        272      271       -1     

Files	Coverage Δ
...otlin/org/jitsi/jicofo/xmpp/ConferenceIqHandler.kt	56.60% <100.00%> (+3.54%)	⬆️

... and 2 files with indirect coverage changes

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