TEL-271 Resubscribing to all remote tracks on rejoin

[genseric-ghiro]

Summary

• Sip doesn't handle reconnection with the room properly
• On resume, nothing to do, same state is kept
• On rejoin, participant gets a new ID and loses all its subscriptions. However, nothing triggers a re-subscription to remote tracks
• This PR adds more stats to quantify the reconnections happening
• It add two new callbacks to handle reconnecting and reconnected events

Test

• Unit tests
• Will be tested by simulating a real call as well

[devin-ai-integration]

Devin Review found 1 new potential issue.

View 3 additional findings in Devin Review.