overlay: actually disable time_daemon, for good

At least on Focal, time_daemon seems to still be able to run despite being disabled in init.qcom.usb.rc. I'm not sure why, but it's probably related to the fact that this service is also defined in hw/init.qcom.rc and init.time_daemon.rc.

So, takes another step and overlay the time_daemon executable itself which prevents it from running at all. As this will cause Android init to restart the service every so often, also add a device-hacks snippet to stop that.

Fixes: https://gitlab.com/ubports/porting/community-ports/android11/fairphone-4/fairphone-fp4/-/issues/61