session-android/res/drawable/sticker_button_light.xml

<?xml version="1.0" encoding="utf-8"?>
<ripple
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/transparent_black_40">

    <item android:id="@+id/mask">
        <shape android:shape="oval">
            <solid android:color="@color/transparent_black" />
        </shape>
    </item>

    <item>
        <shape android:shape="oval" >
            <solid android:color="@color/core_grey_05"/>
        </shape>
    </item>
</ripple>