* Add support for service calls with resopnse data.
Update the service calls to allow returning responses with data,
with an initial use case supporting basic service calls usable
within script.
* Revert enttiy platform/component changes
* Remove unnecessary comma diff
* Revert additional unnecessary changes
* Simplify service call
* Simplify and fix typing and revert whitespace
* Clarify typing intent
* Revert more entity service calls
* Revert additional entity service changes
* Set blocking=True for group notify service call
* Revert unnecessary changes
* Reverting more whitespace changes
* Revert more service changes
* Add test coverage for None return case
* Add parameter to service calls indicating return values were requested
* Update tests/test_core.py
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Add additional service call tests
* Update test comment
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Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
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