Fix max timeout for open commissioning window

Commissioning window can be opened using timeout exceeding
the maximum value of 900 s defined by the spec. This can happen
if selected transport is IP, but the device uses BLE extended
announcement feature.

Added checking if device is commissioned to be able to determine
what max timeout should be used for the particular scenario.

Fixes: project-chip#35505

src/app/server/CommissioningWindowManager.cpp

@@ -302,6 +302,20 @@ CHIP_ERROR CommissioningWindowManager::AdvertiseAndListenForPASE()
     return CHIP_NO_ERROR;
 }
 
+System::Clock::Seconds32 CommissioningWindowManager::MaxCommissioningTimeout() const
+{
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+    /* Allow for extended announcement only if the device is uncomissioned. */
+    if (mServer->GetFabricTable().FabricCount() == 0)
+    {
+        // Specification section 2.3.1 - Extended Announcement Duration up to 48h
+        return System::Clock::Seconds32(60 * 60 * 48);
+    }
+#endif
+    // Specification section 5.4.2.3. Announcement Duration says 15 minutes.
+    return System::Clock::Seconds32(15 * 60);
+}
+
 CHIP_ERROR CommissioningWindowManager::OpenBasicCommissioningWindow(Seconds32 commissioningTimeout,
                                                                     CommissioningWindowAdvertisement advertisementMode)
 {

src/app/server/CommissioningWindowManager.h

@@ -58,16 +58,7 @@ class CommissioningWindowManager : public Messaging::UnsolicitedMessageHandler,
         return CHIP_NO_ERROR;
     }
 
-    static constexpr System::Clock::Seconds32 MaxCommissioningTimeout()
-    {
-#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
-        // Specification section 2.3.1 - Extended Announcement Duration up to 48h
-        return System::Clock::Seconds32(60 * 60 * 48);
-#else
-        // Specification section 5.4.2.3. Announcement Duration says 15 minutes.
-        return System::Clock::Seconds32(15 * 60);
-#endif
-    }
+    System::Clock::Seconds32 MaxCommissioningTimeout() const;
 
     System::Clock::Seconds32 MinCommissioningTimeout() const
     {