For #9525 - Add bottom margin to top sites header

app/src/main/res/layout/top_sites_header.xml

@@ -1,4 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 <androidx.constraintlayout.widget.ConstraintLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
@@ -10,6 +13,8 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/home_screen_top_sites_heading"
+        android:layout_marginBottom="8dp"
+        android:layout_marginStart="4.5dp"
         android:textAppearance="@style/HeaderTextStyle"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintStart_toStartOf="parent"