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fingerprint_dialog_container.xml

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

<FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

<include layout="@layout/fingerprint_dialog_content" />

<include
            layout="@layout/fingerprint_dialog_backup"
            android:visibility="gone" />

</FrameLayout>

<LinearLayout
        android:id="@+id/buttonPanel"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:paddingStart="12dp"
        android:paddingEnd="12dp"
        android:paddingTop="4dp"
        android:paddingBottom="4dp"
        android:gravity="bottom"
        style="?android:attr/buttonBarStyle">

<Space
            android:id="@+id/spacer"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:visibility="invisible" />
        <Button
            android:id="@+id/cancel_button"
            style="?android:attr/buttonBarNegativeButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

<Button
            android:id="@+id/second_dialog_button"
            style="?android:attr/buttonBarPositiveButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </LinearLayout>

</LinearLayout>