Disable "show touches" once window is closed

If --show-touches is set, then the option must be disabled on quit.

Since it executes an adb command, it takes some time, so close the
window beforehand so that the close window button does not seem
unresponsive.

app/src/scrcpy.c

@@ -190,12 +190,12 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
     event_loop();
     LOGD("quit...");
 
+    screen_destroy(&screen);
+
     if (options->show_touches) {
         LOGI("Disable show_touches");
         set_show_touches_enabled(options->serial, SDL_FALSE);
     }
-
-    screen_destroy(&screen);
 finally_stop_and_join_controller:
     controller_stop(&controller);
     controller_join(&controller);