It is a step in the big refactoring to introduce new network emulation
layer for peer connection level e2e test, which will be based on system
sockets level injection.
Bug: webrtc:10138
Change-Id: Ie3854d22aa3eec289617bc432026ea670646556a
Reviewed-on: https://webrtc-review.googlesource.com/c/115943
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26137}