Summary:
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Consolidates the install to 1 command for windows. Also add the `-y` flag so chocolatey doesn't license prompt for each command.
* Get a windows laptop
* Run the 1 command
Closes https://github.com/facebook/react-native/pull/14710
Differential Revision: D5314510
Pulled By: hramos
fbshipit-source-id: 54d46822eb93d4dec7161ef7d4933d6964f40ef3
6aea140a33