This replaces the use of command-line flags with the use of a config struct. This makes it easier for non command-line applications to use the NetEqTestFactory to run simulations. Bug: webrtc:10337 Change-Id: I24533bf206e70e12db9af8d9675769c1ff7c7d48 Reviewed-on: https://webrtc-review.googlesource.com/c/123600 Reviewed-by: Pablo Barrera González <barrerap@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Ivo Creusen <ivoc@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26887}