Fix braille hardware input

Bug: 990425
Change-Id: I70006053906de020ae8e0ca7f5fda70285e5aeb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1810254
Commit-Queue: David Tseng <dtseng@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697729}

chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2

@@ -109,6 +109,9 @@
   "content_security_policy": "default-src 'none'; script-src 'self' chrome://resources; style-src 'unsafe-inline' chrome://resources;",
   "externally_connectable": {
     "ids": [
+       // Braille IME.
+      "jddehjeebkoimngcbdkaahpobgicbffp",
+
        // Allow connections with js2at (name may change) project, which allows
        // web pages and ChromeVox to exchange messages that conform to
        // a set of approved schemas. Note: js2at is currently built as an