Rename buffer_util.h to binary.h

It will allow to expose more binary util functions not related to
buffers.

PR #3369 <https://github.com/Genymobile/scrcpy/pull/3369>

app/src/control_msg.c

@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "util/buffer_util.h"
+#include "util/binary.h"
 #include "util/log.h"
 #include "util/str.h"
 

app/src/demuxer.c

@@ -7,7 +7,7 @@
 #include "decoder.h"
 #include "events.h"
 #include "recorder.h"
-#include "util/buffer_util.h"
+#include "util/binary.h"
 #include "util/log.h"
 
 #define SC_PACKET_HEADER_SIZE 12

app/src/device_msg.c

@@ -4,7 +4,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "util/buffer_util.h"
+#include "util/binary.h"
 #include "util/log.h"
 
 ssize_t

app/src/util/binary.h

@@ -1,5 +1,5 @@
-#ifndef SC_BUFFER_UTIL_H
-#define SC_BUFFER_UTIL_H
+#ifndef SC_BINARY_H
+#define SC_BINARY_H
 
 #include "common.h"