These codecs are currently being added in the internal encoder factory.
This means that the new injectable video codec factories will miss them.
This CL moves adding them into the video engine so that both factory
types will get them.
This CL makes a functional change in that RED, ULPFEC, and FlexFec will
be placed after both the internal and external codecs. Previously,
it was placed between the internal and external codecs.
Bug: webrtc:8527
Change-Id: I5aa7a3ca674f621b17cf3aa095a225c753488e09
Reviewed-on: https://webrtc-review.googlesource.com/22964
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20700}
154ee1fd85