RegisterPacketFeedbackObserver signals congestion controller object is
ready to process incoming packet, thus call it as last statement in the constructor
Bug: webrtc:8325
Change-Id: I31d8ab04c568e639db12c97b649c2d50a489ce24
Reviewed-on: https://webrtc-review.googlesource.com/5860
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20121}