Update RtpPacketizerH264::PacketizeStapA to use
single_packet_reduction_len when all fragments end up in one H.264
packet.
Previous code was using first_packet_reduction_len +
last_packet_reduction_len for this case, which can cause an occasional
RTC_CHECK crash in RtpPacketizerH264::NextAggregatePacket due to
exceeding the available payload capacity of an RTP packet.
Bug: webrtc:15477
Change-Id: Iba1564a6a29618bef22f19d82aba938420994b23
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/319645
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40737}
ab9535c098