Webapp Manifest 'density' field is deprecated

[Splaktar]

1. Mac OS-X El Capitan
2. Versions.
   angular-cli: 1.0.0-beta.6
   node: 4.4.3
   os: darwin x64
3. Repro steps.
   ng new myApp --mobile
4. The log given by the failure.
   N/A.
5. Mention any other details that might be useful.
   According to this Chrome Article:

Please note, there used to be a dedicated “density” field in the manifest spec, this has been removed from the Spec and the implementation in Chrome. If it is defined in your manifest it will be ignored.

The density field is also not listed on the MDN page.

But the manifest currently generated by the angular-cli includes these fields:

 "icons": [
 {
 "src": "/android-chrome-36x36.png",
 "sizes": "36x36",
 "type": "image/png",
 "density": 0.75
 },
 {
 "src": "/android-chrome-48x48.png",
 "sizes": "48x48",
 "type": "image/png",
 "density": 1
 },
 {
 "src": "/android-chrome-72x72.png",
 "sizes": "72x72",
 "type": "image/png",
 "density": 1.5
 },
 {
 "src": "/android-chrome-96x96.png",
 "sizes": "96x96",
 "type": "image/png",
 "density": 2
 },
 {
 "src": "/android-chrome-144x144.png",
 "sizes": "144x144",
 "type": "image/png",
 "density": 3
 },
 {
 "src": "/android-chrome-192x192.png",
 "sizes": "192x192",
 "type": "image/png",
 "density": 4
 }
 ],

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