Error handling in Android

[ButtersHub]

We need to define an Error event that will be thrown to JS. What kind of errors we might have:

• No location permission
• Bluetooth/location turned off - I guess we also need to listen on ACTION_STATE_CHANGED & PROVIDERS_CHANGED
• All the errors we might get when turning on Advertise - in onStartFailure (we might want to ignore the ADVERTISE_FAILED_ALREADY_STARTED error)
• All the errors we might get when turning on Scanning