packages/SystemUI/res/layout/notif_half_shelf_row.xml

<!--
  ~ Copyright (C) 2019 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.ChannelRow
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/half_shelf_row"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="8dp"
    android:clickable="true"
    android:orientation="horizontal"
    android:foreground="?android:attr/selectableItemBackground" >

    <!-- This is where an icon would go *if we wanted one* **wink** -->
    <Space
        android:id="@+id/icon"
        android:layout_height="48dp"
        android:layout_width="48dp"
        android:layout_gravity="center_vertical"
        android:padding="8dp"
    />

    <RelativeLayout
        android:id="@+id/description_container"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_gravity="center_vertical"
        android:gravity="left|center_vertical"
        android:orientation="vertical"
    >
        <TextView
            android:id="@+id/channel_name"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:paddingBottom="0dp"
            android:paddingStart="8dp"
            android:paddingEnd="8dp"
            android:gravity="center_vertical|start"
            android:textSize="14sp"
            android:ellipsize="end"
            android:maxLines="1"
            style="@style/TextAppearance.NotificationInfo.Title"
        />

        <TextView
            android:id="@+id/channel_description"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:paddingStart="8dp"
            android:paddingEnd="8dp"
            android:gravity="center_vertical|start"
            android:textSize="14sp"
            android:ellipsize="end"
            android:maxLines="1"
            android:layout_below="@id/channel_name"
            style="@style/TextAppearance.NotificationInfo.Secondary"
        />
    </RelativeLayout>

    <Switch
        android:id="@+id/toggle"
        android:layout_height="48dp"
        android:layout_width="wrap_content"
        android:layout_gravity="center_vertical"
        android:padding="8dp"
    />
</com.android.systemui.statusbar.notification.row.ChannelRow>