Update Homekit climate.py to remap current mode (#28625)

* Update Homekit climate.py to remap current mode

This update changes the mapping of Homekit's Current Mode Heating/Cooling State  to show the HASS Hvac_action attribute as "idle" instead of "off" when the returned value is 0.

* Update climate.py

removed imported constant no longer being used  (CURRENT_HVAC_OFF)

* corrected update to climate.py

trying again to remove unused constant.

* Update test_climate.py

* removed "change" comment

The added comment describing the change was not needed and should not be included, as it will already be described via "git annotate"  (per @jc2k)

homeassistant/components/homekit_controller/climate.py

@@ -13,7 +13,7 @@ from homeassistant.components.climate.const import (
     HVAC_MODE_COOL,
     HVAC_MODE_HEAT,
     HVAC_MODE_OFF,
-    CURRENT_HVAC_OFF,
+    CURRENT_HVAC_IDLE,
     CURRENT_HVAC_HEAT,
     CURRENT_HVAC_COOL,
     SUPPORT_TARGET_TEMPERATURE,
@@ -39,7 +39,7 @@ MODE_HASS_TO_HOMEKIT = {v: k for k, v in MODE_HOMEKIT_TO_HASS.items()}
 DEFAULT_VALID_MODES = list(MODE_HOMEKIT_TO_HASS)
 
 CURRENT_MODE_HOMEKIT_TO_HASS = {
-    0: CURRENT_HVAC_OFF,
+    0: CURRENT_HVAC_IDLE,
     1: CURRENT_HVAC_HEAT,
     2: CURRENT_HVAC_COOL,
 }

tests/components/homekit_controller/test_climate.py

@@ -213,7 +213,7 @@ async def test_hvac_mode_vs_hvac_action(hass, utcnow):
 
     state = await helper.poll_and_get_state()
     assert state.state == "heat"
-    assert state.attributes["hvac_action"] == "off"
+    assert state.attributes["hvac_action"] == "idle"
 
     # Simulate that current temperature is below target temp
     # Heating might be on and hvac_action currently 'heat'