packages/SystemUI/res/layout/controls_with_favorites.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.
  -->
<merge
    xmlns:android="http://schemas.android.com/apk/res/android">

  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="horizontal"
      android:layout_marginTop="@dimen/controls_top_margin"
      android:layout_marginBottom="@dimen/controls_header_bottom_margin">

    <!-- make sure the header stays centered in the layout by adding a spacer -->
    <Space
        android:layout_width="@dimen/controls_header_menu_size"
        android:layout_height="1dp" />
    <!-- need to keep this outer view in order to have a correctly sized anchor
         for the dropdown menu, as well as dropdown background in the right place -->
    <LinearLayout
        android:id="@+id/controls_header"
        android:orientation="horizontal"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:minHeight="48dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center">
      <TextView
          style="@style/Control.Spinner.Header"
          android:clickable="false"
          android:id="@+id/app_or_structure_spinner"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_gravity="center" />
    </LinearLayout>
    <ImageView
        android:id="@+id/controls_more"
        android:src="@drawable/ic_more_vert"
        android:layout_width="@dimen/controls_header_menu_size"
        android:layout_height="@dimen/controls_header_menu_size"
        android:padding="12dp"
        android:tint="@color/control_more_vert"
        android:layout_gravity="center"
        android:contentDescription="@string/accessibility_menu"
        android:background="?android:attr/selectableItemBackgroundBorderless" />
  </LinearLayout>

  <LinearLayout
      android:id="@+id/global_actions_controls_list"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      android:layout_marginLeft="@dimen/global_actions_side_margin"
      android:layout_marginRight="@dimen/global_actions_side_margin" />
</merge>