session-android/res/drawable/triangle_tick_outgoing_sent_push_light.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
        android:fromDegrees="45"
        android:toDegrees="45"
        android:pivotX="0%"
        android:pivotY="-30%">

    <shape android:shape="rectangle">

        <solid android:color="@color/conversation_item_sent_push_background_light" />

    </shape>
</rotate>