tunerly/app/src/main/res/layout-v21/activity_about.xml

<LinearLayout 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"
    android:background="?attr/colorPrimary"
    android:parentActivityName="com.example.tuner.MainActivity">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        android:theme="?attr/actionBarTheme"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">
    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/about"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/contactSeparator"
            style="?android:attr/listSeparatorTextViewStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:text="@string/contact"
            app:layout_constraintTop_toTopOf="parent"
            tools:layout_editor_absoluteX="0dp" />

        <TextView
            android:id="@+id/contactText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="15dp"
            android:layout_marginTop="10dp"
            android:lineSpacingExtra="3dp"
            android:paddingStart="0dp"
            android:paddingEnd="30dp"
            android:text="@string/contact_text"
            android:textSize="16sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/contactSeparator" />

        <TextView
            android:id="@+id/contactEmail"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="15dp"
            android:paddingStart="0dp"
            android:paddingEnd="30dp"
            android:autoLink="email"
            android:text="@string/contact_email"
            android:textSize="16sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/contactText" />

        <TextView
            android:id="@+id/privacyPolicySeparator"
            style="?android:attr/listSeparatorTextViewStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="@string/privacy_policy"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/contactEmail" />

        <TextView
            android:id="@+id/privacyPolicyLink"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="15dp"
            android:layout_marginTop="10dp"
            android:autoLink="web"
            android:lineSpacingExtra="3dp"
            android:paddingStart="0dp"
            android:paddingEnd="30dp"
            android:text="@string/privacy_policy_link"
            android:textSize="16sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/privacyPolicySeparator" />

        <TextView
            android:id="@+id/githubSeparator"
            style="?android:attr/listSeparatorTextViewStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="@string/github"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/privacyPolicyLink" />

        <TextView
            android:id="@+id/github"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="15dp"
            android:layout_marginTop="10dp"
            android:lineSpacingExtra="3dp"
            android:paddingStart="0dp"
            android:paddingEnd="30dp"
            android:text="@string/github_text"
            android:textSize="16sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/githubSeparator" />

        <TextView
            android:id="@+id/githubLink"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="15dp"
            android:lineSpacingExtra="3dp"
            android:text="@string/github_link"
            android:paddingStart="0dp"
            android:paddingEnd="30dp"
            android:autoLink="web"
            android:textSize="16sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/github" />

        <TextView
            android:id="@+id/versionSeparator"
            style="?android:attr/listSeparatorTextViewStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="@string/version"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/githubLink" />

        <TextView
            android:id="@+id/versionTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:lineSpacingExtra="3dp"
            android:layout_marginStart="15dp"
            android:layout_marginTop="10dp"
            android:textSize="16sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/versionSeparator" />
    </androidx.constraintlayout.widget.ConstraintLayout>
    </ScrollView>
</LinearLayout>