Gadgetbridge/app/src/main/res/layout/activity_appmanager.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="nodomain.freeyourgadget.gadgetbridge.activities.appmanager.AbstractAppManagerFragment">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/appListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:divider="@null" />
</RelativeLayout>