Create new API for getting state of RxBleClient

[dariuszseweryn]

Is your feature request related to a problem? Please describe. RxBleClient#observeStateChanges and RxBleClient#getState no longer give valuable insight in what is needed for a particular BLE action to succeed as with API 31 both scanning and connecting need different permissions for instance.

Describe the solution you'd like An API that would help understand what is still needed for a particular action to succeed

Describe alternatives you've considered Enhance current API to accommodate new requirements but it seems impossible as scan/connect flows are more detached now