Summary:
Explain the **motivation** for making this change. What existing problem does the pull request solve?
Copy&paste from the example in the documentation will cause exception because there is no `AndroidPermissions` object. To avoid confusion we should refer to `PermissionsAndroid` instead since this is how this module is named in the API.
Closes https://github.com/facebook/react-native/pull/9956
Differential Revision: D3889080
Pulled By: hramos
fbshipit-source-id: 8f30d8f51ffee1321088a16a1b454ab163a746a2
74c32e2609