Update SCTP test to use C++ lambdas instead of rtc::Bind
Update SCTP test to use C++ lambdas instead of rtc::Bind

Bug: webrtc:11339
Change-Id: Ibc6818f9d371c17bb6c3e41deee2b51e2b953de0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/201724
Reviewed-by: Taylor <f49cf6381e322b147053b74e4500af8533ac1e4c@webrtc.org>
Commit-Queue: Niels Moller <0057859e47d61d90529d0f66d9ef692cefedb46a@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#33018}

TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc