Request accessibilityPrivate permissions for Chrome test automation extension.

(see: i18n/input/javascript/chos/testing/integration/automation_ext/manifest.json)

This extension is used for Essential Inputs testing, and permission is
needed to enable typing on Virtual Keyboard.

Change-Id: I5fcfc5a8de8d2f12c7302904146e3c36ee21e6bb
Bug: 1039158
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1983686
Commit-Queue: Alex Bergman <abergman@google.com>
Reviewed-by: Ben Wells <benwells@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728441}

chrome/common/extensions/api/_permission_features.json

@@ -30,7 +30,10 @@
   "accessibilityPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"],
-    "whitelist": [ "2FCBCE08B34CCA1728A85F1EFBD9A34DD2558B2E" ]
+    "whitelist": [
+      "0D209B5E4401BB8E7873B5AB5B1346A1CB067015",  // http://crbug.com/1039158
+      "2FCBCE08B34CCA1728A85F1EFBD9A34DD2558B2E"
+    ]
   },
   "activeTab": {
     "channel": "stable",