H.265 bitstream parser currently always assume pps id to be 0 when
calculating the last slice QP. This assumption is incorrect.
Bug: webrtc:13485
Change-Id: I06918df035e8e4a8e68eb3002a49b824ffd5f516
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/337080
Commit-Queue: Jianlin Qiu <jianlin.qiu@intel.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41636}