add some device-state mechinism to FS to allow tracking of device-specific states where they may have more than one call from the same device

src/switch_event.c

@@ -198,6 +198,8 @@ static char *EVENT_NAMES[] = {
 	"CONFERENCE_DATA",
 	"CALL_SETUP_REQ",
 	"CALL_SETUP_RESULT",
+	"CALL_DETAIL",
+	"DEVICE_STATE",
 	"ALL"
 };