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

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    tools:orientation="vertical"
    tools:parentTag="android.widget.LinearLayout">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@drawable/search_toolbar_background"
        android:paddingTop="0dp"
        android:paddingHorizontal="8dp" />

</merge>