shorten class definition

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

@@ -106,10 +106,8 @@ import java.util.Vector;
 /**
  * This can be used to upload things to an ownCloud instance.
  */
-public class ReceiveExternalFilesActivity extends FileActivity implements
-        OnItemClickListener,
-        android.view.View.OnClickListener,
-        CopyAndUploadContentUrisTask.OnCopyTmpFilesTaskListener {
+public class ReceiveExternalFilesActivity extends FileActivity implements OnItemClickListener, android.view.View
+        .OnClickListener, CopyAndUploadContentUrisTask.OnCopyTmpFilesTaskListener {
 
     private static final String TAG = ReceiveExternalFilesActivity.class.getSimpleName();