pwabuilder-android/lib/template/app/src/main/res/layout/activity_main.xml

PWA Builder Android Platform

<?xml version="1.0" encoding="utf-8"?>
<WebView  xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    />