Old thread but i think it's still useful.
I managed to get a similar behaviour using the above code:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="oval">
<size
android:height="56dp"
android:width="56dp"/>
<stroke
android:width="6dp"
android:color="#FFFFFF"/>
</shape>
</item>
<item>
<shape android:shape="oval">
<size
android:height="50dp"
android:width="50dp"/>
<stroke
android:width="6dp"
android:dashGap="140dp"
android:dashWidth="16dp"
android:color="#FF0000"/>
</shape>
</item>
</layer-list>
The key here is to play with the dashGap and dashWidth values until you get the desired image.