app/src/main/res/menu/options_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/user_search"
android:title="@string/user_search_title"
app:showAsAction="collapseActionView|ifRoom"
app:actionViewClass="androidx.appcompat.widget.SearchView"/>
</menu>