Combine navigation stops on Reset row

- Removes navigation stop on secondary texts
- Marks the title of the row as described by the secondary text

Bug: 1012565
Change-Id: I1711169e5cea3b494ff97f5d159e88963c295856
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1917748
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715723}

chrome/browser/resources/settings/chromeos/os_reset_page/os_reset_page.html

@@ -11,10 +11,11 @@
 
     <div route-path="default">
       <div class="settings-box two-line first">
-        <div class="start">
+        <div class="start" aria-describedby="secondaryText">
           $i18n{powerwashTitle}
-          <div class="secondary" id="secondaryText">
-              $i18n{powerwashDescription}
+          <div class="secondary" id="secondaryText"
+              aria-hidden="true">
+            $i18n{powerwashDescription}
           </div>
         </div>
         <div class="separator"></div>