[Request]: [connectivity_plus] Get network state regardless of internet connection

### Plugin

connectivity_plus

### Use case

I would like to check, whether Wi-Fi is turned on or off. I don't care, if there is an internet connection available or not. Same for mobile data.

Currently when I have Wi-Fi enabled but it's not connected to any network, I get `ConnectivityResult.none`.

### Proposal

I'd expect the `Connectivity::checkConnectivity()` method to return which hardware features (Wi-Fi, mobile data) are turned on and not through which hardware the internet connection is established.

Maybe another method would suite that use case better like
```
Future> getConnectivityHardwareStates()
```