Reland of move deprecated CodecType methods. (patchset #1 id:1 of https://codereview.webrtc.org/3010553002/ )

Reason for revert:
Fixes have landed in chromium.

Original issue's description:
> Revert of Remove deprecated CodecType methods. (patchset #1 id:1 of https://codereview.webrtc.org/3009583002/ )
>
> Reason for revert:
> It breaks chromium FYI bots.
>
> E.g.: https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win%20Builder/builds/11615
>
> Original issue's description:
> > Remove deprecated CodecType methods.
> >
> > These are no longer needed as all clients have been updated to use the
> > new methods that always return a value.
> >
> > BUG=None
> >
> > Review-Url: https://codereview.webrtc.org/3009583002
> > Cr-Commit-Position: refs/heads/master@{#19559}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/1a92d0de49779567241e97e50cb69d51257adcce
>
> TBR=magjed@webrtc.org,tommi@webrtc.org,kthelgason@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=None
>
> Review-Url: https://codereview.webrtc.org/3010553002
> Cr-Commit-Position: refs/heads/master@{#19563}
> Committed: https://chromium.googlesource.com/external/webrtc/+/673caedc39f8fc0975fb902041c9000c271bfccf

TBR=magjed@webrtc.org,tommi@webrtc.org,mbonadei@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=None

Review-Url: https://codereview.webrtc.org/3009413002
Cr-Original-Commit-Position: refs/heads/master@{#19816}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: dc80abe975e9523c9bb3eba65240538ee2478c72
2 files changed