How to make one element in ScrollView without scrolling down?

Question

XML

I have a ScrollView, I want to add an advertising LiearLayout at the bottom of the screen so that it does not scroll down with all the elements, how to do this?

Here is my activity

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity"
    android:layout_below="@+id/ads_line"
    android:background="@color/blue_dark">



        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/scrollView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/title"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="50dp"
                android:fontFamily="@font/poppinsbold"
                android:gravity="center"
                android:text="@string/app_title"
                android:textColor="@color/white"
                android:textSize="25sp"
                android:textStyle="bold"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:id="@+id/description"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fontFamily="@font/poppinsmedium"
                android:gravity="center"
                android:layout_marginHorizontal="8dp"
                android:text="@string/description"
                android:textColor="@color/white"
                android:textSize="15sp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/title" />

            <Button
                android:id="@+id/one"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:backgroundTint="@color/blue_light"
                android:text="Bitcoin"
                android:textColor="@color/white"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/description" />

        </androidx.constraintlayout.widget.ConstraintLayout>

</ScrollView>