Fix padding around FRE search engine dialog

chrome/android/java/res/layout/default_search_engine_first_run_fragment.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2017 The Chromium Authors. All rights reserved.
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
 -->
 
 <!-- Layout used to present a set of default search engines to the user. -->
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto"
@@ skipping 33 matching lines @@
                     android:textColor="@color/default_text_color"
                     android:textSize="@dimen/fre_title_text_size"
                     android:text="@string/search_engine_dialog_title" />
 
                 <View style="@style/Divider" />
 
                 <org.chromium.chrome.browser.widget.RadioButtonLayout
                     android:id="@+id/default_search_engine_dialog_options"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
                     android:layout_marginStart="12dp"
                     android:layout_marginEnd="@dimen/signin_chooser_padding" />
             </LinearLayout>
         </org.chromium.chrome.browser.firstrun.FirstRunChooserView>
     </FrameLayout>
 
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="@string/search_engine_dialog_footer"
@@ skipping 13 matching lines @@
         android:paddingStart="@dimen/fre_button_padding"
         android:paddingEnd="@dimen/fre_button_padding"
         android:text="@string/ok"
         android:textAllCaps="true"
         android:textColor="@android:color/white"
         android:textSize="14sp"
         chrome:buttonColor="@color/light_active_color"
         chrome:buttonRaised="false" />
 
 </LinearLayout>