Как сделать перекрытие Toolbar'а лэйаутом?

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:fitsSystemWindows="true"
    android:layout_height="match_parent">
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/bnv_main"
        android:id="@+id/fl_main_dim_effect">

        <androidx.coordinatorlayout.widget.CoordinatorLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/cl_main">

            <com.google.android.material.appbar.AppBarLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:theme="@style/ThemeOverlay.MaterialComponents">

                <androidx.appcompat.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="56dp"
                    app:contentInsetStart="0dp"
                    app:contentInsetEnd="0dp"

                    android:minHeight="?attr/actionBarSize"
                    app:popupTheme="@style/ThemeOverlay.MaterialComponents.Light">

                </androidx.appcompat.widget.Toolbar>
            </com.google.android.material.appbar.AppBarLayout>

            <com.bluelinelabs.conductor.ChangeHandlerFrameLayout
                android:id="@+id/chf_main"
                app:behavior_overlapTop="64dp"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />
            <!--здесь отображается контент-->


        </androidx.coordinatorlayout.widget.CoordinatorLayout>
    </FrameLayout>

    <FrameLayout
        android:id="@+id/chf_sheet"
        android:layout_above="@id/bnv_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bnv_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_gravity="bottom"
        android:foregroundGravity="bottom"
        app:itemIconTint="@color/bnv_menu_checked"
        app:itemTextColor="@color/bnv_menu_checked"
        app:labelVisibilityMode="unlabeled"
        app:menu="@menu/navigation" />
</RelativeLayout>