libs/editor/WordPressEditor/src/main/res/drawable/format_bar_button_strikethrough_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/format_bar_button_strikethrough_highlighted"/>
    <item android:state_pressed="true" android:drawable="@drawable/format_bar_button_strikethrough_highlighted"/>
    <item android:state_enabled="false" android:drawable="@drawable/format_bar_button_strikethrough_disabled"/>
    <item android:drawable="@drawable/format_bar_button_strikethrough"/>
</selector>