Fixed warning log generation for IRAP frames in H265 Aggregation Packet.

When an IRAP frame was present in the Aggregation Packet,
the control flow was incorrectly transferred to SPS parsing
due to ABSL_FALLTHROUGH_INTENDED within the IRAP case statement,
resulting in a parsing error and generating a warning log.
A break statement has been introduced to prevent this fallthrough.

Bug: webrtc:13485
Change-Id: I523fbf548f14b31eae7c41f607fe33572f094aac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/346381
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Cr-Commit-Position: refs/heads/main@{#42132}
diff --git a/modules/rtp_rtcp/source/video_rtp_depacketizer_h265.cc b/modules/rtp_rtcp/source/video_rtp_depacketizer_h265.cc
index cea5507..fdb5680 100644
--- a/modules/rtp_rtcp/source/video_rtp_depacketizer_h265.cc
+++ b/modules/rtp_rtcp/source/video_rtp_depacketizer_h265.cc
@@ -134,7 +134,7 @@
         // https://datatracker.ietf.org/doc/html/rfc7798#section-3.1.1
         parsed_payload->video_header.frame_type =
             VideoFrameType::kVideoFrameKey;
-        ABSL_FALLTHROUGH_INTENDED;
+        break;
       case H265::NaluType::kSps: {
         // Copy any previous data first (likely just the first header).
         std::unique_ptr<rtc::Buffer> output_buffer(new rtc::Buffer());