tests/graphics/RenderThreadTest/res/values/styles.xml

<resources>
    <!-- Application theme. -->
    <style name="AppTheme" parent="android:Theme.Holo.Light">
    </style>

    <style name="AppTheme.Transparent">
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
    </style>

</resources>