Fix buggy phone positions (#2876)

* Guard-clause channel util. to reduce nesting

* Try-fix PhoneAPI position not updating

* Trunk

* Missed it

* Really disable GPS when asked to

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Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>

src/mesh/NodeDB.h

@@ -131,6 +131,13 @@ class NodeDB
     meshtastic_NodeInfoLite *getMeshNode(NodeNum n);
     size_t getNumMeshNodes() { return *numMeshNodes; }
 
+    void setLocalPosition(meshtastic_Position position)
+    {
+        LOG_DEBUG("Setting local position: latitude=%i, longitude=%i, time=%i\n", position.latitude_i, position.longitude_i,
+                  position.time);
+        localPosition = position;
+    }
+
   private:
     /// Find a node in our DB, create an empty NodeInfoLite if missing
     meshtastic_NodeInfoLite *getOrCreateMeshNode(NodeNum n);