Devtools: Surface protocol errors to the users in the active devtools session #235
Description
All right, we should surface if there's any protocol errors happening in active DevTools session. I don't know what the UI should be here, but right now if there's some CDP errors like debug enable requested and that returns an error, we actually don't show it. We should show that as a failure case to the user so they are aware and it becomes more visible.
We should also show if there is no traffic being received from the device. A typical use case here would be that a user opens up the DevTools. It's empty, nothing is happening because the device is locked or whatever, but we should show that to the user as well.