According to the documentation Sensor.notifyError is to "Let the system know the app has encountered an error". This is very vague, especially when a new developer that hasn't encountered this function in the context of sensor pairing reads this.
Please clarify in the documentation when Sensor.notifyError can and should be used!
Also it would be useful if instead of an undocumented System Error we would have a documented, catchable exception in case it's being called when the system thinks it shouldn't be (similar to many other methods that throw some exception if they're not called in the right context).
