[Nearby] Labels for radio buttons on contact visibility page.

Sets up the labels for the radio buttons on the contact visibility page
to fix an extra stop when using a screen reader.

Fixed: 1148462
Bug: b:168841167
Change-Id: I8b31ccfafdc856aa51b1f36fa44ec5317ea9935c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2559091Reviewed-by: James Vecore <vecore@google.com>
Commit-Queue: Michael Hansen <hansenmichael@google.com>
Cr-Commit-Position: refs/heads/master@{#830860}

chrome/browser/resources/nearby_share/shared/nearby_contact_visibility.html

@@ -232,29 +232,32 @@
       <cr-radio-group id="visibilityRadioGroup"
           disabled="[[disableRadioGroup_(contactsState)]]"
           selected="{{selectedVisibility}}">
-        <cr-card-radio-button id="allContacts" class="flex" name="all">
+        <cr-card-radio-button id="allContacts" class="flex" name="all"
+            aria-labelledby="allContactsLabel">
           <div class="card-contents">
             <iron-icon icon="nearby20:contact-all" class="card-icon">
             </iron-icon>
-            <div class="card-label">
+            <div id="allContactsLabel" class="card-label" aria-hidden="true">
               $i18n{nearbyShareContactVisibilityAll}
             </div>
           </div>
         </cr-card-radio-button>
-        <cr-card-radio-button id="someContacts" class="flex" name="some">
+        <cr-card-radio-button id="someContacts" class="flex" name="some"
+            aria-labelledby="someContactsLabel">
           <div class="card-contents">
             <iron-icon icon="nearby20:contact-group" class="card-icon">
             </iron-icon>
-            <div class="card-label">
+            <div id="someContactsLabel" class="card-label" aria-hidden="true">
               $i18n{nearbyShareContactVisibilitySome}
             </div>
           </div>
         </cr-card-radio-button>
-        <cr-card-radio-button id="noContacts" class="flex" name="none">
+        <cr-card-radio-button id="noContacts" class="flex" name="none"
+            aria-labelledby="noContactsLabel">
           <div class="card-contents">
             <iron-icon icon="nearby20:visibility-off" class="card-icon">
             </iron-icon>
-            <div class="card-label">
+            <div id="noContactsLabel" class="card-label" aria-hidden="true">
               $i18n{nearbyShareContactVisibilityNone}
             </div>
           </div>