Empty statuses do not saved.

app/src/main/java/com/xabber/android/data/account/AccountManager.java

@@ -857,7 +857,10 @@ public class AccountManager implements OnLoadListener, OnWipeListener {
      * @param statusText
      */
     public void setStatus(String account, StatusMode statusMode, String statusText) {
+        if (statusText != null && !statusText.trim().isEmpty()) {
             addSavedStatus(statusMode, statusText);
+        }
+
         AccountItem accountItem = getAccount(account);
         setStatus(accountItem, statusMode, statusText);
         try {

app/src/main/java/com/xabber/android/data/account/StatusTable.java

@@ -118,8 +118,6 @@ class StatusTable extends AbstractTable {
     }
 
     void write(StatusMode statusMode, String statusText) {
-        if (statusText == null)
-            statusText = "";
         synchronized (writeLock) {
             if (writeStatement == null) {
                 SQLiteDatabase db = databaseManager.getWritableDatabase();