we now BLE notify for the arrival of new messages

src/MeshBluetoothService.h

@@ -1,6 +1,12 @@
 #pragma once
 
+#include <BLEService.h>
+#include <BLEServer.h>
 #include <Arduino.h>
 
 BLEService *createMeshBluetoothService(BLEServer* server);
 
+/**
+ * Tell any bluetooth clients that the number of rx packets has changed
+ */
+void bluetoothNotifyFromNum(uint32_t newValue);