since we do not need two adapters with TLS and DTLS modes. SSLAdapter is the TLS adapter, SSLStreamAdapter is the DTLS adapter. BUG=webrtc:353750117 Change-Id: I223917c71c88437339380e1f196dcf3c0e2021c8 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/354940 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Philipp Hancke <phancke@meta.com> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42713}