packages/SystemUI/res/layout/keyguard_status_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2014 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
  -->

<!-- Extends RelativeLayout -->
<com.android.systemui.statusbar.phone.KeyguardStatusBarView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui"
    android:id="@+id/keyguard_header"
    android:layout_width="match_parent"
    android:layout_height="@dimen/status_bar_header_height_keyguard"
    android:baselineAligned="false"
    >

    <com.android.systemui.statusbar.phone.MultiUserSwitch android:id="@+id/multi_user_switch"
        android:layout_width="@dimen/multi_user_switch_width_keyguard"
        android:layout_height="@dimen/status_bar_header_height_keyguard"
        android:layout_alignParentEnd="true"
        android:background="@drawable/ripple_drawable"
        android:layout_marginEnd="@dimen/multi_user_switch_keyguard_margin">
        <ImageView android:id="@+id/multi_user_avatar"
            android:layout_width="@dimen/multi_user_avatar_keyguard_size"
            android:layout_height="@dimen/multi_user_avatar_keyguard_size"
            android:layout_gravity="center"
            android:scaleType="centerInside"/>
    </com.android.systemui.statusbar.phone.MultiUserSwitch>

    <LinearLayout android:id="@+id/system_icons_super_container"
        android:layout_width="wrap_content"
        android:layout_height="@dimen/status_bar_header_height"
        android:layout_toStartOf="@id/multi_user_switch"
        android:layout_alignWithParentIfMissing="true"
        android:layout_marginStart="16dp"
        android:paddingEnd="@dimen/system_icons_keyguard_padding_end">
        <FrameLayout android:id="@+id/system_icons_container"
            android:layout_width="wrap_content"
            android:layout_height="@dimen/status_bar_height"
            android:layout_gravity="center_vertical"
            >
            <include layout="@layout/system_icons" />
        </FrameLayout>
        <TextView android:id="@+id/battery_level"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="@dimen/header_battery_margin_keyguard"
            android:paddingEnd="@dimen/battery_level_padding_end"
            android:textColor="#ffffff"
            android:visibility="gone"
            android:textSize="@dimen/battery_level_text_size"
            android:importantForAccessibility="noHideDescendants"/>
    </LinearLayout>

    <com.android.keyguard.CarrierText
        android:id="@+id/keyguard_carrier_text"
        android:layout_width="match_parent"
        android:layout_height="@dimen/status_bar_header_height_keyguard"
        android:layout_marginStart="@dimen/keyguard_carrier_text_margin"
        android:layout_toStartOf="@id/system_icons_super_container"
        android:gravity="center_vertical"
        android:ellipsize="marquee"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textColor="#ffffff"
        android:singleLine="true" />

</com.android.systemui.statusbar.phone.KeyguardStatusBarView>