Split the AnthemAV user flow init from its data (#180765)

tests/components/anthemav/test_config_flow.py

@@ -109,7 +109,15 @@ async def test_device_already_configured(
 
     mock_config_entry.add_to_hass(hass)
     result = await hass.config_entries.flow.async_init(
-        DOMAIN, context={"source": SOURCE_USER}, data=config
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input=config,
     )
 
     assert result.get("type") is FlowResultType.ABORT