session-android/res/menu/conversation_list.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:title="@string/conversation_list__menu_search"
          android:id="@+id/menu_search"
          android:icon="@drawable/ic_menu_search_holo_dark"
          android:actionViewClass="android.widget.SearchView"
          android:showAsAction="ifRoom|collapseActionView" />

</menu>