Fixed bug related when changing orientation of device, message for empty folders disappear

AndroidManifest.xml

@@ -51,6 +51,7 @@
         <activity
             android:name=".ui.activity.FileDisplayActivity"
             android:label="@string/app_name"
+            android:configChanges="orientation|screenSize"
             >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

src/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -38,6 +38,7 @@ import android.content.IntentFilter;
 import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.content.SyncRequest;
+import android.content.res.Configuration;
 import android.content.res.Resources.NotFoundException;
 import android.database.Cursor;
 import android.net.Uri;
@@ -1654,4 +1655,9 @@ FileFragment.ContainerActivity, OnNavigationListener, OnSslUntrustedCertListener
         onTransferStateChanged(file, false, false);
     }
     
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+    }
+
 }