Fix TestPeerConnection_EventHandlers flake

[edaniels]

• Fixes TestPeerConnection_EventHandlers flaky on WASM #2848

This may have originally been needed but it looks like there's nothing preventing connecting -> callback starts -> connected -> callback continues.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.08%. Comparing base (3f2cd52) to head (412310a).

❗ There is a different number of reports uploaded between BASE (3f2cd52) and HEAD (412310a). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (3f2cd52)	HEAD (412310a)
go	2	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2849       +/-   ##
===========================================
- Coverage   78.93%   65.08%   -13.86%     
===========================================
  Files          89       67       -22     
  Lines        8335     3239     -5096     
===========================================
- Hits         6579     2108     -4471     
+ Misses       1279     1005      -274     
+ Partials      477      126      -351     

Flag	Coverage Δ
go	?
wasm	65.08% <ø> (ø)

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