session-android/res/drawable/triangle_bottom_right_corner.xml

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24.0"
    android:viewportHeight="24.0">

    <path
        android:pathData="M24,0 L0,24 L24,24 Z"
        android:strokeColor="#00000000"
        android:fillColor="#ffffff"/>

</vector>