Don't notify for closed group control messages

This addresses an issue where:

• someone would create a closed group
• on other peoples' devices this control message would be received through a background poll or a push notification
• the received message timestamps table would be updated
• processing wouldn't be finished (during a background poll or while handling a push notification the system can cut you off at any time)
• some of the added users don't see the new closed group because when they open the app and get the control message from their swarm it's considered a duplicate and isn't processed again

libsession/src/main/java/org/session/libsession/messaging/sending_receiving/MessageSender.kt

@@ -163,9 +163,11 @@ object MessageSender {
                         }
                         handleSuccessfulMessageSend(message, destination, isSyncMessage)
                         var shouldNotify = (message is VisibleMessage && !isSyncMessage)
+                        /*
                         if (message is ClosedGroupControlMessage && message.kind is ClosedGroupControlMessage.Kind.New) {
                             shouldNotify = true
                         }
+                         */
                         if (shouldNotify) {
                             val notifyPNServerJob = NotifyPNServerJob(snodeMessage)
                             JobQueue.shared.add(notifyPNServerJob)

libsession/src/main/java/org/session/libsession/messaging/sending_receiving/pollers/ClosedGroupPollerV2.kt

@@ -28,7 +28,7 @@ class ClosedGroupPollerV2 {
 
     companion object {
         private val minPollInterval = 4 * 1000
-        private val maxPollInterval = 2 * 60 * 1000
+        private val maxPollInterval = 4 * 60 * 1000
 
         @JvmStatic
         val shared = ClosedGroupPollerV2()