add open group through configuration message

libsession/src/main/java/org/session/libsession/messaging/StorageProtocol.kt

@@ -58,6 +58,7 @@ interface StorageProtocol {
     fun getOpenGroup(threadID: String): OpenGroup?
     fun getThreadID(openGroupID: String): String?
     fun getAllOpenGroups(): Map<Long, PublicChat>
+    fun addOpenGroup(server: String, channel: Long)
 
     // Open Group Public Keys
     fun getOpenGroupPublicKey(server: String): String?

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

@@ -113,7 +113,7 @@ private fun MessageReceiver.handleConfigurationMessage(message: ConfigurationMes
     val allOpenGroups = storage.getAllOpenGroups().map { it.value.server }
     for (openGroup in message.openGroups) {
         if (allOpenGroups.contains(openGroup)) continue
-        // TODO
+        storage.addOpenGroup(openGroup, 1)
     }
 }