Update InAppBrowserDialog.java

Author: monove

src/android/InAppBrowserDialog.java

@@ -21,6 +21,7 @@ Licensed to the Apache Software Foundation (ASF) under one
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.content.Context;
+import android.content.DialogInterface;
 
 import org.json.JSONException;
 import org.json.JSONObject;