Add missing registerDoubleGauge().

[bgrozev]

No description provided.

[codecov]

Codecov Report

Attention: 42 lines in your changes are missing coverage. Please review.

Comparison is base (a67207b) 24.09% compared to head (df5d1cd) 23.25%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #196      +/-   ##
============================================
- Coverage     24.09%   23.25%   -0.85%     
  Complexity      130      130              
============================================
  Files            33       34       +1     
  Lines          1162     1204      +42     
  Branches        105      108       +3     
============================================
  Hits            280      280              
- Misses          864      906      +42     
  Partials         18       18              

Files	Coverage Δ
.../main/kotlin/org/jitsi/metrics/MetricsContainer.kt	69.49% <0.00%> (-9.36%)	⬇️
...rc/main/kotlin/org/jitsi/metrics/MetricsUpdater.kt	0.00% <0.00%> (ø)

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