WordPress/src/main/res/menu/reader_list.xml

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

    <item
        android:id="@+id/menu_reader_settings"
        android:icon="@drawable/gridicons_cog_light"
        android:title="@string/reader_menu_tags"
        app:showAsAction="always" />

    <item
        android:id="@+id/menu_reader_search"
        android:icon="@drawable/gridicons_search_light"
        android:title="@string/search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="always|collapseActionView" />

</menu>