Clear browsing data ui fixes

chrome/android/java/res/xml/clear_browsing_data_preferences_tab.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. -->
 
 <PreferenceScreen
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto">
 
     <org.chromium.chrome.browser.preferences.SpinnerPreference
         android:key="time_period_spinner"
         android:persistent="false"
         android:title="@string/clear_browsing_data_tab_period_title"
         chrome:singleLine="true" />
 
-    <Preference android:layout="@layout/divider_preference_with_bottom_padding" />
+    <Preference
+        android:layout="@layout/divider_preference_with_bottom_padding"
+        android:selectable="false"/>
 
     <org.chromium.chrome.browser.preferences.ClearBrowsingDataTabCheckBoxPreference
         android:key="clear_history_checkbox"
         android:persistent="false"
         android:title="@string/clear_history_title"
         android:summary="@string/clear_browsing_history_summary" />
 
     <org.chromium.chrome.browser.preferences.ClearBrowsingDataTabCheckBoxPreference
         android:key="clear_cookies_checkbox"
         android:persistent="false"
         android:title="@string/clear_cookies_and_site_data_title"
         android:summary="@string/clear_cookies_and_site_data_summary_basic" />
 
     <org.chromium.chrome.browser.preferences.ClearBrowsingDataTabCheckBoxPreference
         android:key="clear_cache_checkbox"
         android:persistent="false"
         android:title="@string/clear_cache_title" />
 
     <org.chromium.chrome.browser.preferences.ClearBrowsingDataTabCheckBoxPreference
         android:key="clear_passwords_checkbox"
         android:persistent="false"
         android:title="@string/clear_passwords_title" />
 
     <org.chromium.chrome.browser.preferences.ClearBrowsingDataTabCheckBoxPreference
         android:key="clear_form_data_checkbox"
         android:persistent="false"
         android:title="@string/clear_form_data_title" />
 
 </PreferenceScreen>