app/src/main/res/drawable/notification_icon.xml
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="108dp"
android:height="108dp"
android:viewportWidth="108"
android:viewportHeight="108">
<group
android:scaleX="4"
android:scaleY="4"
android:translateX="-53"
android:translateY="-53">
<path
android:pathData="M23.0332,30.2725L27.5781,30.2725C31.8595,30.2725 35.3302,26.9088 35.3302,22.7596C35.3302,18.6103 31.8595,15.2467 27.5781,15.2467L21.0185,15.2467C18.5485,15.2467 16.5461,17.1872 16.5461,19.581L16.5461,36.451L23.0332,30.2725Z"
android:strokeWidth="1"
android:fillColor="#FFFFFF"
android:fillType="nonZero"
android:strokeColor="#00000000"/>
</group>
</vector>