Summary:
- [X] Explain the **motivation** for making this change.
- [X] Provide a **test plan** demonstrating that the code is solid.
- [X] Match the **code formatting** of the rest of the codebase.
- [X] Target the `master` branch, NOT a "stable" branch.
`Promise.done` is non-standard, `Promise.then` is preferred as a standardized method. On Android, polyfill filling in `Promise.done` has been most probably taken out in newer versions of `react-native` and app crashes when it tries to query network state through `NetInfo`.
No tests are required for this change.
Closes https://github.com/facebook/react-native/pull/13489
Differential Revision: D4897566
Pulled By: mkonicek
fbshipit-source-id: 140720d7367cd1d9bf8924ec8a118c1bff4e461d
82f3964f2d