Add test coverage for google calendar event response format (#68767)
Add test coverage for google calendar event response format (#68767)

Add test coverage for the calendar event response format as I am about to do some
refactoring and simplification. Notably, each calendar implementation uses a slightly different
API response, and this is codifying that.
toddeye/home-assistant,nkgilley/home-assistant,mezz64/home-assistant,nkgilley/home-assistant,w1ll1am23/home-assistant,w1ll1am23/home-assistant,toddeye/home-assistant,mezz64/home-assistant