Enable chrome.networking.config on Stable channel.

extensions/common/api/_permission_features.json

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This features file defines permissions for extension APIs implemented
 // under src/extensions.
 
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
@@ skipping 204 matching lines @@
         "E24F1786D842E91E74C27929B0B3715A4689A473",  // CryptoToken
         "A28C9619C4C41306FA5236FB4D94DA812F504DE8"   // CryptoToken (dev)
       ]
     }
   ],
   "idle": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
   },
   "networking.config": {
-    "channel": "dev",
+    "channel": "stable",
     "platforms": ["chromeos"],
     "extension_types": ["extension"]
   },
   "networkingPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"],
     "platforms": ["chromeos", "mac", "win", "linux"],
     "whitelist": [
       "0DE0F05680A4A056BCEC864ED8DDA84296F82B40",  // http://crbug.com/434651
       "1C93BD3CF875F4A73C0B2A163BB8FBDA8B8B3D80",  // http://crbug.com/293683
@@ skipping 203 matching lines @@
   },
   "webRequest": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
    },
   "webRequestBlocking": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   }
 }