packages/SystemUI/res/layout/tv_audio_recording_indicator.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ 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.
  -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:orientation="horizontal"
              android:padding="32dp">

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <LinearLayout
            android:id="@+id/icon_texts_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <FrameLayout
                android:layout_width="45dp"
                android:layout_height="47dp">

                <View
                    android:id="@+id/icon_container_bg"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="@drawable/tv_rect_dark_left_rounded"/>

                <FrameLayout
                    android:id="@+id/icon_mic"
                    android:layout_width="35dp"
                    android:layout_height="35dp"
                    android:layout_marginStart="6dp"
                    android:layout_marginTop="6dp"
                    android:layout_marginBottom="6dp">

                    <View
                        android:layout_width="27dp"
                        android:layout_height="27dp"
                        android:layout_gravity="center"
                        android:background="@drawable/tv_circle_dark"/>

                    <ImageView
                        android:id="@+id/pulsating_circle"
                        android:layout_width="27dp"
                        android:layout_height="27dp"
                        android:layout_gravity="center"
                        android:background="@drawable/tv_circle_white_translucent"/>

                    <ImageView
                        android:layout_width="27dp"
                        android:layout_height="27dp"
                        android:layout_gravity="center"
                        android:src="@drawable/tv_ring_white"/>

                    <ImageView
                        android:layout_width="16dp"
                        android:layout_height="16dp"
                        android:layout_gravity="center"
                        android:background="@drawable/tv_ic_mic_white"/>
                </FrameLayout>

            </FrameLayout>

            <LinearLayout
                android:id="@+id/texts_container"
                android:layout_width="wrap_content"
                android:layout_height="47dp"
                android:background="@color/tv_audio_recording_indicator_background"
                android:orientation="vertical"
                android:visibility="visible">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="14dp"
                    android:layout_marginTop="10dp"
                    android:layout_marginBottom="1dp"
                    android:text="@string/mic_active"
                    android:textColor="@android:color/white"
                    android:fontFamily="sans-serif"
                    android:textSize="10dp"/>

                <TextView
                    android:id="@+id/text"
                    android:layout_width="wrap_content"
                    android:layout_height="14dp"
                    android:singleLine="true"
                    android:text="SomeApplication accessed your microphone"
                    android:textColor="@android:color/white"
                    android:fontFamily="sans-serif"
                    android:textSize="8dp"/>

            </LinearLayout>

        </LinearLayout>

    </FrameLayout>

    <View
        android:id="@+id/bg_end"
        android:layout_width="12dp"
        android:layout_height="47dp"
        android:background="@drawable/tv_rect_dark_right_rounded"
        android:visibility="visible"/>

</LinearLayout>