Google Assistant: Create and pass context to service calls (#21551)

* Google Assistant: Create and pass context to service calls

* Refactor request data into separate object and pass to execute.

homeassistant/components/google_assistant/helpers.py

@@ -1,4 +1,5 @@
 """Helper classes for Google Assistant integration."""
+from homeassistant.core import Context
 
 
 class SmartHomeError(Exception):
@@ -16,10 +17,19 @@ class SmartHomeError(Exception):
 class Config:
     """Hold the configuration for Google Assistant."""
 
-    def __init__(self, should_expose, allow_unlock, agent_user_id,
+    def __init__(self, should_expose, allow_unlock,
                  entity_config=None):
         """Initialize the configuration."""
         self.should_expose = should_expose
-        self.agent_user_id = agent_user_id
         self.entity_config = entity_config or {}
         self.allow_unlock = allow_unlock
+
+
+class RequestData:
+    """Hold data associated with a particular request."""
+
+    def __init__(self, config, user_id, request_id):
+        """Initialize the request data."""
+        self.config = config
+        self.request_id = request_id
+        self.context = Context(user_id=user_id)