Use a new scrcpy icon

Use the new icon designed by @varlesh:
<https://github.com/Genymobile/scrcpy/pull/1987#issuecomment-949684080>

Load it from a PNG file (SDL only supports bitmap icons).

app/src/screen.c

@@ -5,9 +5,8 @@
 #include <SDL2/SDL.h>
 
 #include "events.h"
-#include "icon.xpm"
+#include "icon.h"
 #include "scrcpy.h"
-#include "tiny_xpm.h"
 #include "video_buffer.h"
 #include "util/log.h"
 
@@ -405,10 +404,10 @@ screen_init(struct screen *screen, const struct screen_params *params) {
         LOGD("Trilinear filtering disabled (not an OpenGL renderer)");
     }
 
-    SDL_Surface *icon = read_xpm(icon_xpm);
+    SDL_Surface *icon = scrcpy_icon_load();
     if (icon) {
         SDL_SetWindowIcon(screen->window, icon);
-        SDL_FreeSurface(icon);
+        scrcpy_icon_destroy(icon);
     } else {
         LOGW("Could not load icon");
     }