feat: Mark bridge unhealthy based on restart requests from endpoints

[bgrozev]

• ref: Simplify code, order alphabetically.
• feat: Keep track of number of endpoints on each Bridge.
• feat: Mark bridge unhealthy based on restart requests from endpoints

[codecov]

Codecov Report

Attention: Patch coverage is 30.64516% with 43 lines in your changes missing coverage. Please review.

Project coverage is 26.51%. Comparing base (7431511) to head (7fd30bb).
Report is 24 commits behind head on master.

Files with missing lines	Patch %	Lines
.../src/main/kotlin/org/jitsi/jicofo/bridge/Bridge.kt	21.21%	26 Missing ⚠️
...tsi/jicofo/conference/JitsiMeetConferenceImpl.java	0.00%	10 Missing ⚠️
...i/jicofo/bridge/colibri/ColibriV2SessionManager.kt	0.00%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1210      +/-   ##
============================================
- Coverage     27.27%   26.51%   -0.77%     
+ Complexity      489      466      -23     
============================================
  Files           125      125              
  Lines          8084     8162      +78     
  Branches       1121     1136      +15     
============================================
- Hits           2205     2164      -41     
- Misses         5597     5712     +115     
- Partials        282      286       +4     

Files with missing lines	Coverage Δ
...ain/kotlin/org/jitsi/jicofo/bridge/BridgeConfig.kt	93.39% <100.00%> (+2.21%)	⬆️
...n/kotlin/org/jitsi/jicofo/bridge/BridgeSelector.kt	60.62% <ø> (-0.14%)	⬇️
...tsi/jicofo/bridge/colibri/ColibriSessionManager.kt	0.00% <ø> (ø)
...i/jicofo/bridge/colibri/ColibriV2SessionManager.kt	0.00% <0.00%> (ø)
...tsi/jicofo/conference/JitsiMeetConferenceImpl.java	40.48% <0.00%> (-2.07%)	⬇️
.../src/main/kotlin/org/jitsi/jicofo/bridge/Bridge.kt	65.35% <21.21%> (-7.55%)	⬇️

... and 6 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 54138e0...7fd30bb. Read the comment docs.