samples/wearable/Quiz/Application/src/main/res/values/styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="android:Theme.Holo">
        <!-- Customize your theme here. -->
    </style>

    <style name="bg_picker">
        <item name="android:layout_marginLeft">16dp</item>
        <item name="android:background">@drawable/unselected_background</item>
    </style>

</resources>