Suppport navigator.connection.type

[cpetrov]

Problem description

For apps that work with remote data, it would be advantageous to determine the network state of the user's device in order to be able to e.g.:

• suggest to the user to turn on his network connection if it is disabled
• issue a warning when about to download large amounts of data over a cellular connection

This API has been implemented in the cordova-plugin-network-information plugin, but it would be handy to have it in the core framework.

Environment

• Tabris.js version: 3.5.0