improve connection eventing on cell

Author: halyssonJr

Source/implementations/f7/Meadow.F7/Devices/Esp32Coprocessor/SharedEnums.cs

@@ -577,6 +577,15 @@ public enum CellFunction
     /// CellFunction - NtpUpdateEvent
     /// </summary>
     NtpUpdateEvent = 5,
+    /// <summary>
+    /// CellFunction - NetworkConnectingEvent
+    /// </summary>
+    NetworkConnectingEvent = 8,
+
+    /// <summary>
+    /// CellFunction - NetworkRetryExceededEvent
+    /// </summary>
+    NetworkRetryExceededEvent = 9,
 };
 
 /// <summary>

Source/implementations/f7/Meadow.F7/Devices/F7CellNetworkAdapter.cs

@@ -178,6 +178,14 @@ protected void InvokeEvent(CellFunction eventId, StatusCodes statusCode, byte[]
             case CellFunction.NtpUpdateEvent:
                 RaiseNtpTimeChangedEvent();
                 break;
+            case CellFunction.NetworkConnectingEvent:
+                Resolver.Log.Trace("Cell connecting event triggered!");
+                RaiseNetworkConnecting();
+                break;
+            case CellFunction.NetworkRetryExceededEvent:
+                Resolver.Log.Trace("Cell retry exceeded event triggered!");
+                RaiseConnectFailed();
+                break;
             default:
                 Resolver.Log.Trace("Event type not found");
                 break;