DevTools: Localize accessibility strings and add descriptions

Accessibility strings in front_end/accessibility/AccessibilityStrings.js
are not localized. They are displayed in Elements pane -> Accessiblity
pane -> Computed Properties. See https://imgur.com/HtE1ZhP.

I wrap them in ls`` and add them to accessibility_strings.grdp file with
descriptions.

Description of a 'name' string:
Accessibility attribute name that appears under the Computed Properties
section in the Accessibility pane of the Elements pane

Description of a 'description' string:
Tooltip text that appears when hovering over the '<name>' attribute name
under the Computed Properties section in the Accessibility pane of the
Elements pane


Bug: 941561
Change-Id: I655760c02ee31ef4e22385c9dc003fd4152c93c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1648332
Commit-Queue: Mandy Chen <mandy.chen@microsoft.com>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#667327}

third_party/blink/renderer/devtools/front_end/accessibility/AccessibilityNodeView.js

@@ -164,7 +164,7 @@ Accessibility.AXNodePropertyTreeElement = class extends UI.TreeElement {
     const nameElement = createElement('span');
     const AXAttributes = Accessibility.AccessibilityStrings.AXAttributes;
     if (name in AXAttributes) {
-      nameElement.textContent = ls(AXAttributes[name].name);
+      nameElement.textContent = AXAttributes[name].name;
       nameElement.title = AXAttributes[name].description;
       nameElement.classList.add('ax-readable-name');
     } else {
@@ -392,8 +392,8 @@ Accessibility.AXValueSourceTreeElement = class extends Accessibility.AXNodePrope
         if (source.nativeSource) {
           const AXNativeSourceTypes = Accessibility.AccessibilityStrings.AXNativeSourceTypes;
           const nativeSource = source.nativeSource;
-          nameElement.textContent = ls(AXNativeSourceTypes[nativeSource].name);
-          nameElement.title = ls(AXNativeSourceTypes[nativeSource].description);
+          nameElement.textContent = AXNativeSourceTypes[nativeSource].name;
+          nameElement.title = AXNativeSourceTypes[nativeSource].description;
           nameElement.classList.add('ax-readable-name');
           break;
         }
@@ -404,12 +404,12 @@ Accessibility.AXValueSourceTreeElement = class extends Accessibility.AXNodePrope
       default:
         const AXSourceTypes = Accessibility.AccessibilityStrings.AXSourceTypes;
         if (type in AXSourceTypes) {
-          nameElement.textContent = ls(AXSourceTypes[type].name);
-          nameElement.title = ls(AXSourceTypes[type].description);
+          nameElement.textContent = AXSourceTypes[type].name;
+          nameElement.title = AXSourceTypes[type].description;
           nameElement.classList.add('ax-readable-name');
         } else {
           console.warn(type, 'not in AXSourceTypes');
-          nameElement.textContent = ls(type);
+          nameElement.textContent = type;
         }
     }
     this.listItemElement.appendChild(nameElement);