This adds the absolutely required files for this target that is used by Chrome and others in order to link in all needed libraries, and removes the dependency on peerconnection. Bug: webrtc:13634 Change-Id: Ia66f5f627680ce15bcac941998ca1b6da4edb6ed Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/331621 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41395}