docs: update notepad tutorial to change EditNote activity title and update codelab zip

      <pre>setContentView(R.layout.note_edit);</pre>

    </li>

    <li>

      Find the edit and button components we need:

      Change the Activity title to the "Edit Note" string:

      <pre>setTitle(R.string.edit_note);</pre>

    </li>

    <li>

      Find the {@link android.widget.EditText} and {@link android.widget.Button} components we need:

      <p>These are found by the

      IDs associated to them in the R class, and need to be cast to the right

      type of <code>View</code> (<code>EditText</code> for the two text views,