This is in preparation for actually doing this initialization
differently in the Call class. This CL takes the registration
steps that are inherently network thread associated and makes
them separate from the ctor/dtor.
Bug: webrtc:11993
Change-Id: Ice2e16c108e0c302157534a3aa2b46738aaa7a93
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/220608
Commit-Queue: Tommi <tommi@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34163}
02df2eb1de