ChromeVox Touchscreen: issues with left-side menu

When in ChromeVox mode and using the touchscreen, the expected behavior:
- Single tap on navigation options should announce the name of the option
- Single tap, wait, then double tap will actually open the navigation page

Removing the pointer-events property above, fixes the issues.

The pointer-events property was originally introduced as part of this
change:
https://chromium.googlesource.com/chromium/src.git/+/2a7833f23c226fa1650883dd30a825bc96e78971https://chromium-review.googlesource.com/c/chromium/src/+/1702788

Bug: 1115704
Test: manual
Change-Id: I493a29f7ad631f578a4ce8555f9c3008ac35bdeb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2468387
Auto-Submit: Michael Irani <michaelirani@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Michael Irani <michaelirani@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816821}

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

@@ -66,7 +66,6 @@
         margin-inline-end: 2px;
         min-height: 32px;
         padding-inline-start: 20px;
-        pointer-events: none;
       }
 
       :host-context([dir=rtl]) a > .item {