Explore better handleing of hub connection

[guyluz11]

It looks like the last version of grpc have brought some new functionality that may help us improve the connection reliability to the hub

The current way of connecting try to handle a lot of different cases and the code can be improved, even more so with the last grpc update.

We aspire for the app and the hub to keep an open stream between the two all the time. There are some cases that making that hard for us.

The app should handle the following cases

• Automatically connect to the hub through Wi-Fi if it's stopped and the app is still on the home Wi-Fi.
• Automatically reconnect to the hub through Wi-Fi if user turn off and then on the Wi-Fi.
• Automatically moving between direct connection to the hub through Wi-Fi and connection to the hub through remote pipes if it is on different network than home Wi-Fi (that's include cellular network and other Wi-Fi networks).

[guyluz11]

Dropping for now Hub connection in favor of app as a hub