session-android/res/layout/camera_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/core_black">

    <TextureView
        android:id="@+id/camera_preview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

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

    <FrameLayout
        android:id="@+id/camera_close_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/small_spacing"
        android:padding="@dimen/small_spacing"
        android:background="@drawable/circle_touch_highlight_background"
        android:clickable="true"
        android:focusable="true">

        <ImageView
            android:layout_width="36dp"
            android:layout_height="36dp"
            android:src="@drawable/ic_baseline_clear_24"
            android:tint="@android:color/white"/>

    </FrameLayout>

</FrameLayout>