Enable by default the look for the first echo.
Bug: webrtc:14205
Change-Id: Iae904679c1432f3a0766263907cf376903685b97
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/278043
Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org>
Commit-Queue: Lionel Koenig <lionelk@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38452}