Make sure TalkBack focused on entire of new incognito tab menu option

Bug: 1120273
Change-Id: I599b51cab1d6b61c47f98cb85c4c935adcf58d07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2423354Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Gang Wu <gangwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809391}

chrome/android/java/src/org/chromium/chrome/browser/app/appmenu/IncognitoMenuItemViewBinder.java

@@ -52,7 +52,10 @@ class IncognitoMenuItemViewBinder implements CustomViewBinder {
 
         holder.title.setCompoundDrawablesRelative(item.getIcon(), null, null, null);
         holder.title.setEnabled(item.isEnabled());
-        holder.title.setFocusable(item.isEnabled());
+        // Setting |holder.title| to non-focusable will allow TalkBack highlighting the whole view
+        // of the menu item, not just title text.
+        holder.title.setFocusable(false);
+        convertView.setFocusable(item.isEnabled());
         if (IncognitoUtils.isIncognitoModeManaged()) {
             holder.image.setVisibility(View.VISIBLE);
         }