extends the range of allowed dynamic payload types by the
lower range [35, 63] from
https://www.iana.org/assignments/rtp-parameters/rtp-parameters.xhtml#rtp-parameters-1
The upper limit of that range is chosen to avoid the payload types 64
and 65 which may conflict with RTCP as described in
https://tools.ietf.org/html/rfc5761#section-4
A killswitch WebRTC-PayloadTypes-Lower-Dynamic-Range is added to
allow turning this off should it result in interoperability issues.
BUG=webrtc:12194
Change-Id: I7564cc190e4c18cd5b48510a5b6a467c13b0fae4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/195821
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32790}