ClientConnectionStateChanged
data class ClientConnectionStateChanged(val device: ClientDevice, val status: BleGattConnectionStatus, val newState: GattConnectionState) : ServerGattEvent.GattClientConnectionEvent
Event indicating when a remote device has been connected or disconnected.
See also
(https://developer.android.com/reference/android/bluetooth/BluetoothGattServerCallback#onConnectionStateChange(android.bluetooth.BluetoothDevice,%20int,%20int))