tree a5e9c6bcae09d1142c9cbe5bf2cc92e3fbc7bfb0
parent b8abf38648b4bdadb39b3723038180061ef121c5
author fayang <fayang@google.com> 1580414451 -0800
committer Copybara-Service <copybara-worker@google.com> 1580414502 -0800

Instead of checking handshake done frame received, just check both endpoints' handshake state is HANDSHAKE_CONFIRMED. There is a possibility where HANDSHAKE_DONE frame is received before observer gets set.

gfe-relnote: n/a (test only)
PiperOrigin-RevId: 292396283
Change-Id: I36387fa17c292cbf69b68d8b532f4b1447014a6f