wifi: Make some StaWifiMac methods public

...so that they can be called by the Association Manager

src/wifi/model/sta-wifi-mac.h

@@ -131,6 +131,19 @@ public:
    */
   void SetWifiPhys (const std::vector<Ptr<WifiPhy>>& phys) override;
 
+  /**
+   * Forward a probe request packet to the DCF. The standard is not clear on the correct
+   * queue for management frames if QoS is supported. We always use the DCF.
+   */
+  void SendProbeRequest (void);
+
+  /**
+   * This method is called after wait beacon timeout or wait probe request timeout has
+   * occurred. This will trigger association process from beacons or probe responses
+   * gathered while scanning.
+   */
+  void ScanningTimeout (void);
+
   /**
    * Return whether we are associated with an AP.
    *
@@ -207,11 +220,6 @@ private:
    */
   void UpdateCandidateApList (ApInfo newApInfo);
 
-  /**
-   * Forward a probe request packet to the DCF. The standard is not clear on the correct
-   * queue for management frames if QoS is supported. We always use the DCF.
-   */
-  void SendProbeRequest (void);
   /**
    * Forward an association or reassociation request packet to the DCF.
    * The standard is not clear on the correct queue for management frames if QoS is supported.
@@ -236,12 +244,6 @@ private:
    * active probing flag.
    */
   void StartScanning (void);
-  /**
-   * This method is called after wait beacon timeout or wait probe request timeout has
-   * occurred. This will trigger association process from beacons or probe responses
-   * gathered while scanning.
-   */
-  void ScanningTimeout (void);
   /**
    * Return whether we are waiting for an association response from an AP.
    *