Revert "[Settings] Hide Chromevox settings subpage in kiosk mode"

This reverts commit 6eeaad9a.

Reason for revert: ChromeVox settings persistence issue was fixed,
we can show the menu again.

Original change's description:
> [Settings] Hide Chromevox settings subpage in kiosk mode
> 
> We are under discussions about the state of chromevox settings page.
> Let's hide it for now.
> 
> Bug: 1061068
> Change-Id: I21c0f184ee44e5cc9d60b81d731e9dd19148740a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2199268
> Commit-Queue: Anatoliy Potapchuk <apotapchuk@chromium.org>
> Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
> Auto-Submit: Anatoliy Potapchuk <apotapchuk@chromium.org>
> Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#768583}

TBR=khorimoto@chromium.org,apotapchuk@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1061068
Change-Id: I0deaab917e26234c2f37d79f07fb34fcc4593928
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2364632
Commit-Queue: Anatoliy Potapchuk <apotapchuk@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Anatoliy Potapchuk <apotapchuk@chromium.org>
Auto-Submit: Anatoliy Potapchuk <apotapchuk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799994}

chrome/browser/resources/settings/chromeos/os_a11y_page/manage_a11y_page.html

@@ -51,13 +51,11 @@
         pref="{{prefs.settings.accessibility}}"
         label="$i18n{chromeVoxLabel}">
     </settings-toggle-button>
-    <template is="dom-if" if="[[!isKioskModeActive_]]">
-      <iron-collapse opened="[[prefs.settings.accessibility.value]]">
-        <cr-link-row id="chromeVoxSubpageButton"
-            class="settings-box" on-click="onChromeVoxSettingsTap_"
-            label="$i18n{chromeVoxOptionsLabel}" external></cr-link-row>
-      </iron-collapse>
-    </template>
+    <iron-collapse opened="[[prefs.settings.accessibility.value]]">
+      <cr-link-row id="chromeVoxSubpageButton"
+          class="settings-box" on-click="onChromeVoxSettingsTap_"
+          label="$i18n{chromeVoxOptionsLabel}" external></cr-link-row>
+    </iron-collapse>
     <settings-toggle-button
         pref="{{prefs.settings.a11y.select_to_speak}}"
         class="hr"

chrome/test/data/webui/settings/chromeos/manage_accessibility_page_tests.js

@@ -97,7 +97,9 @@ suite('ManageAccessibilityPageTests', function() {
     // Accessibility learn more link should be hidden.
     assertFalse(isVisible(page.$$('setings-localized-link')));
 
-    const allowed_subpages = ['selectToSpeakSubpageButton', 'ttsSubpageButton'];
+    const allowed_subpages = [
+      'chromeVoxSubpageButton', 'selectToSpeakSubpageButton', 'ttsSubpageButton'
+    ];
 
     const subpages = page.root.querySelectorAll('cr-link-row');
     subpages.forEach(function(subpage) {