packages/SystemUI/res/layout/quick_settings_header_info.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2018 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
  -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/header_text_container"
    android:layout_width="match_parent"
    android:layout_height="@dimen/qs_header_tooltip_height"
    android:layout_below="@id/quick_status_bar_system_icons"
    android:visibility="invisible"
    android:theme="@style/QSHeaderTheme"
    android:forceHasOverlappingRendering="false">

        <com.android.systemui.qs.QSHeaderInfoLayout
            android:id="@+id/status_container"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent">

            <LinearLayout
                android:id = "@+id/alarm_container"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="center_vertical"
                android:focusable="true"
                android:clickable="true">

                <ImageView
                    android:id="@+id/next_alarm_icon"
                    android:layout_width="@dimen/qs_header_alarm_icon_size"
                    android:layout_height="@dimen/qs_header_alarm_icon_size"
                    android:src="@drawable/ic_alarm"
                    android:contentDescription="@string/accessibility_quick_settings_alarm_set"
                    android:visibility="gone"/>

                <com.android.systemui.util.AutoMarqueeTextView
                    android:id="@+id/next_alarm_text"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:singleLine="true"
                    android:ellipsize="marquee"
                    android:marqueeRepeatLimit="marquee_forever"
                    android:layout_marginStart="@dimen/qs_header_alarm_text_margin_start"
                    android:textAppearance="@style/TextAppearance.QS.Status"
                    android:visibility="gone"/>
            </LinearLayout>

            <View
                android:id="@+id/status_separator"
                android:layout_width="@dimen/qs_header_separator_width"
                android:layout_height="match_parent"
                android:visibility="gone"/>

            <LinearLayout
                android:id = "@+id/ringer_container"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="center_vertical"
                android:focusable="true"
                android:clickable="true">

                <ImageView
                    android:id="@+id/ringer_mode_icon"
                    android:layout_width="@dimen/qs_header_alarm_icon_size"
                    android:layout_height="@dimen/qs_header_alarm_icon_size"
                    android:visibility="gone"/>

                <com.android.systemui.util.AutoMarqueeTextView
                    android:id="@+id/ringer_mode_text"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:singleLine="true"
                    android:ellipsize="marquee"
                    android:marqueeRepeatLimit="marquee_forever"
                    android:layout_marginStart="@dimen/qs_header_alarm_text_margin_start"
                    android:textAppearance="@style/TextAppearance.QS.Status"
                    android:visibility="gone"/>
            </LinearLayout>
        </com.android.systemui.qs.QSHeaderInfoLayout>

        <include layout="@layout/qs_carrier_group"
                 android:id="@+id/carrier_group"
                 android:layout_width="wrap_content"
                 android:layout_height="match_parent"
                 android:layout_marginStart="@dimen/qs_status_separator"
                 android:layout_gravity="end|center_vertical"
                 android:focusable="false"/>

</LinearLayout>