libmm-common: `MMSimpleStatus' won't be considered internal any more

Renamed `MMCommonSimpleProperties' to `MMSimpleStatus', and removed the
`MMSimpleStatusProperties' provided in libmm-glib. We'll just use the original
one from libmm-common always.

src/mm-iface-modem-messaging.c

@@ -33,7 +33,7 @@ static GQuark storage_context_quark;
 
 void
 mm_iface_modem_messaging_bind_simple_status (MMIfaceModemMessaging *self,
-                                            MMCommonSimpleProperties *status)
+                                             MMSimpleStatus *status)
 {
 }