Initialize FrameInfo rotation in GenericDecoderTest

GenericDecoderTest color-space cases construct FrameInfo directly. The default constructor leaves rotation uninitialized, which can trip UBSan when GenericDecoder reads the enum.

Initialize rotation to kVideoRotation_0 in both tests.

Bug: webrtc:514423244
Change-Id: Ifebf07c0e4d0489ff87cb58d65ec6a7d7e7fd00e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/473520
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Boris Tsirkin <btsirkin@meta.com>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47734}

modules/video_coding/generic_decoder_unittest.cc

diff --git a/modules/video_coding/generic_decoder_unittest.cc b/modules/video_coding/generic_decoder_unittest.cc
index c0eaebd..2a36bbc 100644
--- a/modules/video_coding/generic_decoder_unittest.cc
+++ b/modules/video_coding/generic_decoder_unittest.cc
@@ -29,6 +29,7 @@
 #include "api/video/video_content_type.h"
 #include "api/video/video_frame.h"
 #include "api/video/video_frame_type.h"
+#include "api/video/video_rotation.h"
 #include "api/video/video_timing.h"
 #include "api/video_codecs/video_decoder.h"
 #include "common_video/include/corruption_score_calculator.h"
@@ -256,6 +257,7 @@
   FrameInfo frame_info;
   frame_info.rtp_timestamp = kRtpTimestamp;
   frame_info.decode_start = Timestamp::Zero();
+  frame_info.rotation = kVideoRotation_0;
   frame_info.content_type = VideoContentType::UNSPECIFIED;
   frame_info.frame_type = VideoFrameType::kVideoFrameKey;
   frame_info.color_space = kMappedColorSpace;
@@ -324,6 +326,7 @@
   FrameInfo frame_info;
   frame_info.rtp_timestamp = kRtpTimestamp;
   frame_info.decode_start = Timestamp::Zero();
+  frame_info.rotation = kVideoRotation_0;
   frame_info.content_type = VideoContentType::UNSPECIFIED;
   frame_info.frame_type = VideoFrameType::kVideoFrameKey;
   frame_info.color_space = std::nullopt;