Check possibility of getting current props of Yeelight devices, when in music mode

[deankevorkian]

As of now, when using any function that relays on GetProp (for example - getting current brightness, color, etc.), the library checks if music mode is activated.
If it's activated, then we just request it without waiting for a result/response, expecting everything to be OK.
However there may be times where we do want to wait for a result that would be returned to the client, even if music mode is on (if it's possible).

We have to check if such thing is possible and make a PR to YeelightAPI.