quickstep/res/layout/gesture_tutorial_foldable_mock_taskbar.xml

<?xml version="1.0" encoding="utf-8"?>
<com.android.quickstep.interaction.AnimatedTaskbarView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="@dimen/gesture_tutorial_mock_taskbar_height">

    <View
        android:id="@+id/taskbar_background"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/gesture_tutorial_taskbar_color"

        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/icon_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"

        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent">

        <androidx.cardview.widget.CardView
            android:id="@+id/taskbar_icon_1"
            android:layout_width="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_height="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_marginStart="@dimen/gesture_tutorial_taskbar_padding_start_end"

            app:cardElevation="0dp"
            app:cardCornerRadius="@dimen/gesture_tutorial_taskbar_icon_corner_radius"
            app:cardBackgroundColor="@color/mock_app_icon_1"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintHorizontal_chainStyle="spread_inside"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toStartOf="@id/taskbar_icon_2"/>

        <androidx.cardview.widget.CardView
            android:id="@+id/taskbar_icon_2"
            android:layout_width="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_height="@dimen/gesture_tutorial_taskbar_icon_size"

            app:cardElevation="0dp"
            app:cardCornerRadius="@dimen/gesture_tutorial_taskbar_icon_corner_radius"
            app:cardBackgroundColor="@color/mock_app_icon_2"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toEndOf="@id/taskbar_icon_1"
            app:layout_constraintEnd_toStartOf="@id/taskbar_icon_3"/>

        <androidx.cardview.widget.CardView
            android:id="@+id/taskbar_icon_3"
            android:layout_width="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_height="@dimen/gesture_tutorial_taskbar_icon_size"

            app:cardElevation="0dp"
            app:cardCornerRadius="@dimen/gesture_tutorial_taskbar_icon_corner_radius"
            app:cardBackgroundColor="@color/mock_app_icon_3"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toEndOf="@id/taskbar_icon_2"
            app:layout_constraintEnd_toStartOf="@id/taskbar_icon_4"/>

        <androidx.cardview.widget.CardView
            android:id="@+id/taskbar_icon_4"
            android:layout_width="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_height="@dimen/gesture_tutorial_taskbar_icon_size"

            app:cardElevation="0dp"
            app:cardCornerRadius="@dimen/gesture_tutorial_taskbar_icon_corner_radius"
            app:cardBackgroundColor="@color/mock_app_icon_1"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toEndOf="@id/taskbar_icon_3"
            app:layout_constraintEnd_toStartOf="@id/taskbar_icon_5"/>

        <androidx.cardview.widget.CardView
            android:id="@+id/taskbar_icon_5"
            android:layout_width="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_height="@dimen/gesture_tutorial_taskbar_icon_size"

            app:cardElevation="0dp"
            app:cardCornerRadius="@dimen/gesture_tutorial_taskbar_icon_corner_radius"
            app:cardBackgroundColor="@color/mock_app_icon_4"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toEndOf="@id/taskbar_icon_4"
            app:layout_constraintEnd_toStartOf="@id/taskbar_icon_6"/>

        <androidx.cardview.widget.CardView
            android:id="@+id/taskbar_icon_6"
            android:layout_width="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_height="@dimen/gesture_tutorial_taskbar_icon_size"
            android:layout_marginEnd="@dimen/gesture_tutorial_taskbar_padding_start_end"

            app:cardElevation="0dp"
            app:cardCornerRadius="@dimen/gesture_tutorial_taskbar_icon_corner_radius"
            app:cardBackgroundColor="@color/mock_app_icon_2"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toEndOf="@id/taskbar_icon_5"
            app:layout_constraintEnd_toEndOf="parent"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

</com.android.quickstep.interaction.AnimatedTaskbarView>