This is a reland of 3e0dee2660
Original change's description:
> Android: Remove deprecated PeerConnectionFactory ctors
>
> This CL removes deprecated PeerConnectionFactory ctors as well as some
> deprecated comments and functions left from the
> PeerConnectionFactory.initialize work.
>
> Bug: webrtc:9158
> Change-Id: I757f85b52cbfdbe15bf2570c394202b898892550
> Reviewed-on: https://webrtc-review.googlesource.com/70400
> Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
> Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#23085}
TBR=sakal
Bug: webrtc:9158
Change-Id: Idb3628be85cc3268a7a4cf6990af5ed2f406ab07
Reviewed-on: https://webrtc-review.googlesource.com/74400
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23114}