Fix CMD_SCREEN_ON constant in accordance with #323

[Victor4X]

This implements the change mentioned in #323.

The original issue of not getting any information in HASS was caused by update()

python-androidtv/androidtv/androidtv/androidtv_async.py

Line 84 in b1425b1

async def update(self, get_running_apps=True, lazy=True):

using the lazy parameter in get_properties(), which doesn't retrieve any information unless the screen is on:

python-androidtv/androidtv/androidtv/androidtv_async.py

Line 182 in b1425b1

if lazy and not (screen_on and awake):

The change adds an additional way to check whether or not the screen is on, and should still function properly in older android versions.

More work is needed to determine the cause of periodic state:Off logs: #323 (comment)

[chatziko]

@JeffLIrion : could you please publish a new pypi release containing this fix?

[JeffLIrion]

@chatziko done!

[chatziko]

@JeffLIrion : many thanks!