Signal-Android/app/src/main/res/layout/call_participant_item.xml

<?xml version="1.0" encoding="utf-8"?>
<org.thoughtcrime.securesms.components.webrtc.CallParticipantView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:layout_height="match_parent"
    tools:layout_width="match_parent">

    <org.thoughtcrime.securesms.components.AvatarImageView
        android:id="@+id/call_participant_item_avatar"
        android:layout_width="112dp"
        android:layout_height="112dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />

    <ImageView
        android:id="@+id/call_participant_item_pip_avatar"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:visibility="gone"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />

    <org.thoughtcrime.securesms.components.webrtc.TextureViewRenderer
        android:id="@+id/call_participant_renderer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="gone"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</org.thoughtcrime.securesms.components.webrtc.CallParticipantView>