Add 'acre_api_fnc_getRadioOnOffState' to accessible method

[gerard-sog]

Is your enhancement related to a problem?
NO (but not being able to easily get if radio is ON/OFF is annoying script wise).

Solution you'd like:
Be able to obtain ON or OFF status of an ACRE radio.

Additional context:
I created a PR to add the enhancement: #1339

[jonpas]

Merged in #1339