Uncurry the function MuxRange and avoid allocating a reader in
isRTCP.  The included benchmark indicates that we avoid five
allocations per packet.

Active becomes "empty" after consuming the packets, but instead of the
"filled" getting purged by "purgeConsumedBuffers", it doesn't because
active is now empty and empty buffers cannot cause any purging. So the
solution is to purge the "consumed" area first, then "active".

Fixes #1810

RID is now set on remote tracks, if provided
Adds SetRTPParameters which can be used in ORTC to set codec information
about the remote track

If sample is null, PopWithTimestamp will crash with SIGSEGV.

In some rare cases during ice connection stage
change may result in deadlock. This fix makes
iceConnectionState and connectionState atomic
which should prevent deadlock.

If the PayloadType changes for a SSRC update the codec on the
TrackRemote.

Resolves #1850

Generated by renovateBot

This allows to set supported codecs per transceiver.

Resolves #1847

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