Fix wxOSX compilation problem due to missing wx/settings.h

Include the header required by the code using wxSystemSettings added in
5091d87825

See #18146.

src/osx/carbon/statbrma.cpp

@@ -14,6 +14,7 @@
 
 #include "wx/statusbr.h"
 #include "wx/platinfo.h"
+#include "wx/settings.h"
 
 #ifndef WX_PRECOMP
     #include "wx/dc.h"