Assert no repair after stop

Update module github.com/pion/sctp to v1.9.0

Generated by renovateBot

Option to check for fingerprint in DTLS handshake

Option to ignore rid pause in `a=simulcast:recv`

Before this change, if the SDP offer has paused rids,
SDP answer echoed it back. That causes issues where enabling/disabling
of layers is signalled via the signalling channel. The following
scenario breaks
1. PeerB signals PeerA to disable all simulcast layers.
2. PeerA sends an SDP offer with RIDs disabled.
   a. NOTE: A renegotiation is not needed, but happens for a different
      reason.
3. PeerB signals again to PeerA to re-enable layers.
4. PeerB sends answer for the offer in Step 2 with paused rids.
5. PeerA keeps layers paused.

Adding a setting engine option to not change existing behaviour. Pause
state of a rid will be ignored if setting is enabled.

Handle nil stats getter in collect stats

It is possible to call GetStats() after the peer connection is closed.
The statsGetter gets cleared when peer connection is closed. That is
causing a panic when RtpReceiver.collectStats runs.

Add interface for getting media-playout stats

Do not create receiver for ealy media in offerer

For offerer, if the remote side sends early media
before the remote description (answer) is received,
the undeclared SSRC processor can create a receiver
and that receiver could be left dangling as
transceiver `mid` is not updated from remote
description answer.

Still leaving the simulcast probe path and only
avoiding creating a receiver for non-simulcast path.

Add a flag `handleUndeclaredSSRCWithoutAnswer` to control handling
of early media without SDP answer for non-simulcast tracks.
The default behaviour is to not process early media without SDP answer.

 Update module github.com/pion/ice/v2 to v2.3.38

H265 reader & writer

H265 raeder & writer

Updated Test_TrackLocalStatic_Padding test

Use custom packetizer in Test_TrackLocalStatic_Padding to verify that
padding added in different ways works.