Don't use stat() on Android

h/t Pere

src/tuxpaint.c

@@ -14356,16 +14356,20 @@ static SDL_Surface *load_starter_helper(char *path_and_basename,
   char fname[256];
   SDL_Surface *surf;
   unsigned int i;
+#ifndef __ANDROID__
   struct stat stat_buf;
+#endif
 
   ext = strdup(extension);
   safe_snprintf(fname, sizeof(fname), "%s.%s", path_and_basename, ext);
 
+#ifndef __ANDROID__
   if (stat(fname, &stat_buf) != 0)
   {
     /* File by that name doesn't exist; give up now */
     return NULL;
   }
+#endif
 
   surf = (*load_func) (fname);
 
@@ -21733,6 +21737,7 @@ static SDL_Surface *myIMG_Load_RWops(const char *file)
    otherwise call SDL_Image lib's IMG_Load() (for PNGs, JPEGs, BMPs, etc.) */
 static SDL_Surface *myIMG_Load(const char *file)
 {
+#ifndef __ANDROID__
   struct stat stat_buf;
 
   if (stat(file, &stat_buf) != 0)
@@ -21740,6 +21745,7 @@ static SDL_Surface *myIMG_Load(const char *file)
     /* File by that name doesn't exist; give up now */
     return NULL;
   }
+#endif
 
   if (strlen(file) > 4 && strcasecmp(file + strlen(file) - 4, ".kpx") == 0)
   {