examples/ex2_espresso/src/androidTest/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.google.android.mobly.snippet.example2.test">
    <application>
        <uses-library android:name="android.test.runner" />
    </application>

    <instrumentation
        android:name="androidx.test.runner.AndroidJUnitRunner"
        android:targetPackage="com.google.android.mobly.snippet.example2" />
</manifest>