packages/SystemUI/res/layout/tv_pip_overlay.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
**
** Copyright 2016, 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.
*/
-->

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/guide_overlay"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:paddingTop="6dp"
        android:paddingBottom="6dp"
        android:paddingStart="10dp"
        android:paddingEnd="10dp"
        android:textSize="14sp"
        android:textColor="#EEEEEE"
        android:fontFamily="sans-serif"
        android:background="@drawable/tv_pip_overlay_background"
        android:lineSpacingMultiplier="1.465"
        android:gravity="center"
        android:maxLines="2"
        android:text="@string/pip_hold_home" />
    <LinearLayout
        android:id="@+id/guide_buttons"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal">
        <ImageView
            android:layout_width="19dp"
            android:layout_height="19dp"
            android:src="@drawable/ic_fullscreen_white_24dp" />
        <ImageView
            android:layout_width="19dp"
            android:layout_height="19dp"
            android:src="@drawable/ic_close_white" />
        <ImageView
            android:id="@+id/guide_button_play_pause"
            android:layout_width="19dp"
            android:layout_height="19dp"
            android:src="@drawable/ic_pause_white_24dp" />
    </LinearLayout>
</RelativeLayout>