tools/layoutlib/bridge/tests/res/testApp/MyApplication/src/main/res/drawable/ic_launcher.xml

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#ff0000" />
    <size
        android:width="20dp"
        android:height="20dp" />
</shape>