api: only allow including `ModemManager.h' directly

src/mm-broadband-modem.h

@@ -21,8 +21,9 @@
 #include <glib.h>
 #include <glib-object.h>
 
+#include <ModemManager.h>
+
 #include "mm-base-modem.h"
-#include "ModemManager-enums.h"
 
 #define MM_TYPE_BROADBAND_MODEM            (mm_broadband_modem_get_type ())
 #define MM_BROADBAND_MODEM(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_BROADBAND_MODEM, MMBroadbandModem))

src/mm-error-helpers.h

@@ -20,8 +20,8 @@
 
 #include <glib-object.h>
 
-#include <ModemManager-errors.h>
-#include <mm-errors-types.h>
+#include <ModemManager.h>
+#include <libmm-glib.h>
 
 GError *mm_connection_error_for_code         (MMConnectionError code);
 GError *mm_mobile_equipment_error_for_code   (MMMobileEquipmentError code);