refactor: Change CustomActivate and Initialize methods to protected access in multiple classes for better inheritance control

src/PepperDash.Essentials.Core/Devices/EssentialsDevice.cs

@@ -87,7 +87,7 @@ public abstract class EssentialsDevice : Device
     /// Override this method to perform any initialization that requires all devices to be activated. This method is called automatically after the DeviceManager.AllDevicesActivated event is fired, and should not be called directly.
     /// </summary>
     /// <returns></returns>
-    public override bool CustomActivate()
+    protected override bool CustomActivate()
     {
         CreateMobileControlMessengers();
 

src/PepperDash.Essentials.Core/Devices/GenericMonitoredTcpDevice.cs

@@ -63,7 +63,7 @@ namespace PepperDash.Essentials.Core.Devices;
   /// CustomActivate method
   /// </summary>
   /// <inheritdoc />
-		public override bool CustomActivate()
+		protected override bool CustomActivate()
 		{
 			CommunicationMonitor.Start();
 			return true;