selection_menu_background_triangle.xml

<vector
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:name="vector"
    android:width="100dp"
    android:height="50dp"
    android:viewportWidth="100"
    android:viewportHeight="50">
    <group
        android:name="trianglegroup"
        android:pivotX="50"
        android:pivotY="50"
        android:scaleX="0.92"
        android:scaleY="0.92"
        android:translateY="-50"
        android:rotation="180">
        <path
            android:name="triangle2"
            android:pathData="M 50 0 L 100 50 L 0 50 Z"
            android:strokeColor="@color/iron"
            android:strokeWidth="6"/>
    </group>
    <group
        android:name="trianglegroup2"
        android:pivotX="50"
        android:pivotY="50"
        android:scaleX="0.85"
        android:scaleY="0.85"
        android:translateY="-50"
        android:rotation="180">
        <path
            android:name="triangle"
            android:pathData="M 50 0 L 100 50 L 0 50 Z"
            android:fillColor="@color/asphalt"/>
    </group>
</vector>