Enable chrome.hid API on all channels.

Promote the chrome.hid API to the stable channel.

BUG=305300

Review URL: https://codereview.chromium.org/448143003

Cr-Commit-Position: refs/heads/master@{#288268}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288268 0039d316-1c4b-4281-b951-d872f2087c98

extensions/common/api/_permission_features.json

@@ -38,7 +38,7 @@
   ],
   "hid": [
     {
-      "channel": "dev",
+      "channel": "stable",
       "extension_types": ["platform_app"]
     },
     {