LottieSample/src/main/res/drawable/render_time_button_background.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke android:width="1dp" android:color="@color/item_selected_teal" />
    <corners android:radius="2dp" />
</shape>