Fix build with ffmpeg 5.0

PR #2948 <https://github.com/Genymobile/scrcpy/pull/2948>

Signed-off-by: Bernhard Rosenkränzer <bero@lindev.ch>
Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/stream.c

@@ -1,7 +1,6 @@
 #include "stream.h"
 
 #include <assert.h>
-#include <libavformat/avformat.h>
 #include <libavutil/time.h>
 #include <unistd.h>
 
@@ -192,7 +191,7 @@ static int
 run_stream(void *data) {
     struct stream *stream = data;
 
-    AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_H264);
+    const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_H264);
     if (!codec) {
         LOGE("H.264 decoder not found");
         goto end;