Add polling for CX3550

[kongo09]

Some devices need polling to update data as push doesn't work, like CX3550. See discussion here #178 . Idea is to send a beep off value to trigger data polling.

No UI setting is needed as so far this only affects this one device, so the capability setting can be made part of the device properties.

@EuleMitKeule

[EuleMitKeule]

I'll try to implement this, but it might take a few weeks.

[iceymanz]

I've just purchased a CX3550/01 with Firmware: [email protected] device FW 0.1.7

If I run "aioairctrl --host -D status-observe" - on the console I can observe updates made from the app and made from buttons on the device itself.

Although it did crash once when turning on the device with ValueError: non-hexadecimal number found in fromhex() arg at position 488

Can you leverage this polling method? Happy to do any testing / provide logs required.