getCurrentState

Returns a cold Flow that samples the active network's INTERNET capability before registering a default-network callback. Sampling and registration are not an atomic snapshot.

The sample emits NetworkState.CONNECTED or NetworkState.UNAVAILABLE. Subsequent callbacks emit CONNECTED, NetworkState.LOST, or UNAVAILABLE; LOSING and capability changes are logged without emitting. Consecutive equal values are suppressed.

Each collector registers its own callback, removed when collection closes. Callback registration errors can terminate collection.