[Switch Access] Hide the menu when not navigating through it

Occasionally when Switch Access is trying to recover from an error
condition, the action menu remains open when the user is not navigating
through it. Close the action menu when recovering from invalid states.

AX-Relnotes: n/a.
Bug: None.
Change-Id: Iced9e6a480e85b02d10a75704b71200bfa6271d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2292994Reviewed-by: Akihiro Ota <akihiroota@chromium.org>
Commit-Queue: Anastasia Helfinstein <anastasi@google.com>
Cr-Commit-Position: refs/heads/master@{#787949}

chrome/browser/resources/chromeos/accessibility/switch_access/navigation_manager.js

@@ -178,6 +178,9 @@ class NavigationManager {
       }
     }
 
+    // Make sure the menu isn't open.
+    MenuManager.exit();
+
     const child = navigator.group_.firstValidChild();
     if (groupIsValid && child) {
       navigator.setNode_(child);