packages/SystemUI/res/layout/foreground_service_dungeon.xml

<!--
  ~ Copyright (C) 2020 The Android Open Source Project
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<com.android.systemui.statusbar.notification.row.ForegroundServiceDungeonView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/foreground_service_dungeon"
    android:layout_width="@dimen/qs_panel_width"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal|bottom"
    android:visibility="visible"
>
    <LinearLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:gravity="bottom"
        android:visibility="visible"
        android:background="@drawable/notif_dungeon_bg_gradient"
    >

        <!-- divider view -->
        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@color/GM2_grey_200"
            android:visibility="visible"
        />

        <TextView
            android:id="@+id/dungeon_title"
            android:layout_height="48dp"
            android:layout_width="match_parent"
            android:padding="8dp"
            android:text="Apps active in background"
            android:textColor="@color/GM2_grey_200"
        />

        <!--  List containing the actual foreground service notifications  -->
        <LinearLayout
            android:id="@+id/entry_list"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="bottom"
            android:orientation="vertical" >
        </LinearLayout>

    </LinearLayout>
</com.android.systemui.statusbar.notification.row.ForegroundServiceDungeonView>