Signal-Android/res/layout/quick_attachment_drawer.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">

    <org.thoughtcrime.securesms.components.camera.CameraView
        android:id="@+id/quick_camera"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="invisible" />

</merge>