Telemetry phone api guard (#1805)

* Delay start of telemetry modules

* Don't send unless our toPhoneQueue is empty

* Get wrecked, checks!

src/mesh/MeshService.cpp

@@ -283,3 +283,8 @@ int MeshService::onGPSChanged(const meshtastic::GPSStatus *newStatus)
 
     return 0;
 }
+
+bool MeshService::isToPhoneQueueEmpty() 
+{
+    return toPhoneQueue.isEmpty();
+}