Use react-navigation header component

[vfaramond]

Is your feature request related to a problem? Please describe.
The project is using a custom header component (src/components/Header). Using the one provided by react-navigation will allow us to let react-navigation handle layout difference between devices such as iPhone X.

Describe the solution you'd like
We can leverage react-navigation built-in header component by passing props to each screen (using title, headerLeft and headerRight screen props).

Additional context
Add any other context or screenshots about the feature request here.