Disable autofill management button when autofill is disabled

fix brave#5146

Auditors: @bsclifton

Test Plan:
1. Go to about:preferences#security
2. Toggle "Enable Autofill" off
3. Manage Autofill Data button should be disabled

js/about/preferences.js

@@ -1528,7 +1528,7 @@ class SecurityTab extends ImmutableComponent {
         <Button l10nId='manageAutofillData' className='primaryButton manageAutofillDataButton'
           onClick={aboutActions.newFrame.bind(null, {
             location: 'about:autofill'
-          }, true)} />
+          }, true)} disabled={!getSetting(settings.AUTOFILL_ENABLED, this.props.settings)} />
       </SettingsList>
       <div className='sectionTitle' data-l10n-id='doNotTrackTitle' />
       <SettingsList>