Retry alarms/timers fetching from every discovered device on every coordinator update

Describe the bug

Google Home devices are mistakenly filtered: Devices that actually contain alarms/timers are filtered out if the API request fails to establish because of underlying issues of pychromcast. Please see there two log entries where my Google Home devices were filtered out because the API request to them unexpectedly returned 404.

Version of the integration

If you are unsure about the version check the github release here.

Google Home v1.0.1

Logs

From these logs, you see that I used to have a working Kitchen device that got filtered out and no more data fetched from it (1st screenshot) and Living Room device that also got filtered out (2nd screenshot)

Expected behaviour

Retry fetching alarms/timers from device(s) on every coordinator update

[leikoilja]

1. Let’s keep this issue (#119) as a tracking issue for retrying fetching alarms/timers on every coordinator update
2. Periodically fetching Foyer devices tracking issue - #122

[KapJI]

Sounds good.