[New Connector] Google Portability API (Search history)

[tahpot]

Add support for Google's Data Portability API.

Start by implementing support for saving a user's search history.

Notes:

1. Need to request the scope https://www.googleapis.com/auth/dataportability.myactivity.search
2. No other scopes can be requested at the same time as the data portability API, so it requires it's own connection / provider
3. Documentation is here https://developers.google.com/data-portability