Import Cobalt 21.master.0.270962

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/5690
    by n1214.hwang@samsung.com
diff --git a/src/starboard/shared/ffmpeg/ffmpeg_audio_decoder_impl.cc b/src/starboard/shared/ffmpeg/ffmpeg_audio_decoder_impl.cc
index 3d8f090..f4b931d 100644
--- a/src/starboard/shared/ffmpeg/ffmpeg_audio_decoder_impl.cc
+++ b/src/starboard/shared/ffmpeg/ffmpeg_audio_decoder_impl.cc
@@ -18,9 +18,7 @@
 #include "starboard/shared/ffmpeg/ffmpeg_audio_decoder_impl.h"
 
 #include "starboard/audio_sink.h"
-#if SB_API_VERSION >= 11
-#include "starboard/format_string.h"
-#endif  // SB_API_VERSION >= 11
+#include "starboard/common/format_string.h"
 #include "starboard/common/log.h"
 #include "starboard/common/string.h"
 #include "starboard/memory.h"
diff --git a/src/starboard/shared/ffmpeg/ffmpeg_video_decoder_impl.cc b/src/starboard/shared/ffmpeg/ffmpeg_video_decoder_impl.cc
index 0509caa..9c1f321 100644
--- a/src/starboard/shared/ffmpeg/ffmpeg_video_decoder_impl.cc
+++ b/src/starboard/shared/ffmpeg/ffmpeg_video_decoder_impl.cc
@@ -17,9 +17,7 @@
 
 #include "starboard/shared/ffmpeg/ffmpeg_video_decoder_impl.h"
 
-#if SB_API_VERSION >= 11
-#include "starboard/format_string.h"
-#endif  // SB_API_VERSION >= 11
+#include "starboard/common/format_string.h"
 #include "starboard/common/string.h"
 #include "starboard/linux/shared/decode_target_internal.h"
 #include "starboard/memory.h"