Add documentation.

Author: Sam1301

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -2310,8 +2310,9 @@ public enum Flag {
     }
 
     /**
-     * TODO: add description
-     * @return
+     * Get current message list fragment.
+     *
+     * @return {@link MessageListFragment}
      */
     public MessageListFragment getCurrentMessageList() {
         if (narrowedList == null) {

app/src/main/java/com/zulip/android/networking/AsyncGetEvents.java

@@ -461,8 +461,9 @@ public void run() {
     }
 
     /**
-     * TODO: add description
-     * @param messageEditLimitEvents
+     * Get updated edit time limit from event of type {@link EventsBranch.BranchType#EDIT_MESSAGE_TIME_LIMIT}
+     *
+     * @param messageEditLimitEvents list of events {@link EventsBranch}
      */
     private void processMessageEditParam(List<EventsBranch> messageEditLimitEvents) {
         for (EventsBranch wrapper : messageEditLimitEvents) {
@@ -474,6 +475,12 @@ private void processMessageEditParam(List<EventsBranch> messageEditLimitEvents)
         }
     }
 
+    /**
+     * Update messages in database from list of {@link EventsBranch.BranchType#UPDATE_MESSAGE} type
+     * events {@link EventsBranch}.
+     *
+     * @param updateEvents list of events {@link EventsBranch.BranchType#UPDATE_MESSAGE}
+     */
     private void processUpdateMessages(List<EventsBranch> updateEvents) {
         for (EventsBranch event : updateEvents) {
             UpdateMessageWrapper updateEvent = (UpdateMessageWrapper) event;

app/src/main/java/com/zulip/android/networking/response/events/UpdateMessageWrapper.java

@@ -10,7 +10,8 @@
 import java.util.List;
 
 /**
- * TODO: Add description
+ * This class is used to deserialize the update_message type events {@link EventsBranch.BranchType#UPDATE_MESSAGE}.
+ *
  * example: {"rendered_content":"<p>(deleted</p>","sender":"[email protected]",
  *      "edit_timestamp":1485954038,"orig_content":"(deleted)","message_ids":[142650],
  *      "content":"(deleted","orig_rendered_content":"<p>(deleted)</p>","flags":["read"],"id":31,
@@ -61,15 +62,6 @@ public Message getMessage() {
         return null;
     }
 
-    // TODO: remove these if cntent is not used
-    public String getContent() {
-        return this.content;
-    }
-
-    public void setContent(String content) {
-        this.content = content;
-    }
-
     public String getFormattedContent() {
         return this.formattedContent;
     }