Increases readability of configuration setup by separating
first time configuration setup and reconfiguration.
Bug: None
Change-Id: Ifee29c31bce505a971ab5993cb862a72db94725a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/220700
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Markus Handell <handellm@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34159}