[remoting] Don't reorder video codecs in m=video line of SDP.

The host process sets a codec preference by munging the m=video line of
the outgoing SDP offer. This doesn't appear to have any effect - the
website sets its preferred ordering in the SDP answer, which overrides
the host preference for VP8.

This CL removes the munging of the m=video line in the host process.

Bug: 40634468
Change-Id: I5cc17c03bcdb582eb1bbdd5497b0dc26902d37e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6477444
Commit-Queue: Joe Downing <joedow@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Auto-Submit: Lambros Lambrou <lambroslambrou@chromium.org>
Commit-Queue: Lambros Lambrou <lambroslambrou@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1449671}