Add --no-vd-system-decorations

Add an option to disable the following flag for virtual displays:

    DisplayManager.VIRTUAL_DISPLAY_FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS

Some devices render a broken UI when this flag is enabled.

Fixes #5494 <https://github.com/Genymobile/scrcpy/issues/5494>

app/src/server.c

@@ -376,6 +376,9 @@ execute_server(struct sc_server *server,
         VALIDATE_STRING(params->new_display);
         ADD_PARAM("new_display=%s", params->new_display);
     }
+    if (!params->vd_system_decorations) {
+        ADD_PARAM("vd_system_decorations=false");
+    }
     if (params->list & SC_OPTION_LIST_ENCODERS) {
         ADD_PARAM("list_encoders=true");
     }