Update permissions to include all supported domains, and remove externally_connectable.

externally_connectable is unused in this extension.

BUG=397019

Review URL: https://codereview.chromium.org/687803003

Cr-Commit-Position: refs/heads/master@{#302727}

chrome/browser/resources/hotword/manifest.json

@@ -28,6 +28,10 @@
 
   "permissions": [
     "*://*.google.com/*",
+    "*://*.google.ru/*",
+    "*://*.google.co.uk/*",
+    "*://*.google.fr/*",
+    "*://*.google.de/*",
     "chrome://newtab/",
     "chrome://resources/",
     "audioCapture",
@@ -37,13 +41,6 @@
     "tabs"
   ],
 
-  "externally_connectable": {
-    "matches": [
-      "*://*.google.com/*",
-      "chrome://newtab/"
-    ]
-  },
-
   "import": [
     {
       "id": "lccekmodgklaepjeofjdjpbminllajkg"