Changed database name according to realm Position

Author: kunall17

app/src/main/java/com/zulip/android/ZulipApp.java

@@ -217,7 +217,7 @@ public void addToMutedTopics(JSONArray jsonArray) {
     }
 
     public void setEmail(String email) {
-        databaseHelper = new DatabaseHelper(this, email);
+        databaseHelper = new DatabaseHelper(this, SERVER_SETTINGS + currentRealm);
         this.you = Person.getOrUpdate(this, email, null, null);
     }