docs: Added card to download Nexus system images for Marshmallow.

bug: 24814127

Change-Id: I46e1bd44afdde7f4f9f7cad3bf2a3b60253d8558

docs/html/jd_collections.js

@@ -1409,14 +1409,6 @@ var RESOURCE_COLLECTIONS = {
       "https://support.google.com/googleplay/answer/2651410"
     ]
   },
-  "marshmallow/landing/resources": {
-    "title": "",
-    "resources": [
-      "about/versions/marshmallow/android-6.0-changes.html",
-      "about/versions/marshmallow/android-6.0.html",
-      "about/versions/marshmallow/samples.html"
-    ]
-  },
   "autolanding": {
     "title": "",
     "resources": [
@@ -1643,9 +1635,9 @@ var RESOURCE_COLLECTIONS = {
   "marshmallow/landing/resources": {
     "title": "",
     "resources": [
-       "about/versions/marshmallow/android-6.0-changes.html",
        "about/versions/marshmallow/android-6.0.html",
-       "about/versions/marshmallow/samples.html"
+       "about/versions/marshmallow/samples.html",
+       "https://developers.google.com/android/nexus/images"
     ]
   },
   "marshmallow/landing/videos": {

docs/html/jd_extras.js

@@ -583,6 +583,19 @@ DISTRIBUTE_RESOURCES = DISTRIBUTE_RESOURCES.concat([
     "type": "support",
     "titleFriendly": ""
   },
+  {
+    "lang": "en",
+    "group": "",
+    "tags": [],
+    "url": "https://developers.google.com/android/nexus/images",
+    "timestamp": 1194884220000,
+    "image": "images/cards/card-download_16-9_2x.png",
+    "title": "System Images",
+    "summary": "Download system images for Marshmallow.",
+    "keywords": [],
+    "type": "support",
+    "titleFriendly": ""
+  },
   {
     "lang": "zh-cn",
     "group": "",