Made changes to AppScreen's update feature

Author: amyyong11

src/main/java/appscreen/AppScreen.java

@@ -162,7 +162,6 @@ public void addNewChat(Chat chat){
         }
     }
 
-
     /**
      * Update the order of chats that appear on screen if there was a change to conversation history
      * @param chatID The ID of the given chat

src/main/java/appscreen/AppScreenController.java

@@ -1,6 +1,7 @@
 package appscreen;
 
 import testerEntities.*;
+
 public interface AppScreenController extends LoginSuccess{
     Chat getChat(String chatID);
 

src/main/java/appscreen/AppScreenPresenter.java

@@ -1,4 +1,5 @@
 package appscreen;
+
 public interface AppScreenPresenter {
     void displayAppScreen();
 }

src/main/java/appscreen/ChatName.java

@@ -1,6 +1,7 @@
 package appscreen;
 
 import testerEntities.*;
+
 public interface ChatName {
     String getChatName(Chat chat);
 }

src/main/java/appscreen/LoginSuccess.java

@@ -1,4 +1,5 @@
 package appscreen;
+
 public interface LoginSuccess {
     void openScreen();
 }

src/main/java/appscreen/Refresh.java

@@ -1,4 +1,5 @@
 package appscreen;
+
 public interface Refresh {
     boolean hasUpdate(String chatID);
     void updateScreen(String chatID);