godot/platform/android/java/editor/src/main/res/layout/godot_game_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:tools="http://schemas.android.com/tools"
	android:layout_width="match_parent"
	android:layout_height="match_parent">

	<FrameLayout
		android:id="@+id/godot_fragment_container"
		android:layout_width="match_parent"
		android:layout_height="match_parent"/>

	<ImageView
		android:id="@+id/godot_pip_button"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_margin="36dp"
		android:contentDescription="@string/pip_button_description"
		android:background="@drawable/pip_button_bg_drawable"
		android:scaleType="center"
		android:src="@drawable/outline_fullscreen_exit_48"
		android:visibility="gone"
		android:layout_gravity="end|top"
		tools:visibility="visible" />

</FrameLayout>