fix: Fixes features in disco-info.

[damencho]

Partially reverts 1e9d01b. If we do not initialize features before connecting, the jigasi and audio-muted features are not always seen by jicofo.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 19.22%. Comparing base (7029888) to head (1c2c7ef).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/main/java/org/jitsi/jigasi/JvbConference.java	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #620      +/-   ##
============================================
+ Coverage     18.99%   19.22%   +0.23%     
- Complexity      308      310       +2     
============================================
  Files            83       83              
  Lines          7193     7194       +1     
  Branches        956      956              
============================================
+ Hits           1366     1383      +17     
+ Misses         5604     5583      -21     
- Partials        223      228       +5     

Files with missing lines	Coverage Δ
src/main/java/org/jitsi/jigasi/JvbConference.java	33.86% <66.66%> (+1.57%)	⬆️

... and 4 files with indirect coverage changes

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