zumo_2.0_android/app/src/main/res/layout/view_container.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout
  android:id="@+id/container"
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

</android.support.constraint.ConstraintLayout>