Add accept keyword to Media selector (#145527)

* Add accept keyword to Media selector

* Adjust test

tests/helpers/test_llm.py

@@ -1125,7 +1125,7 @@ async def test_selector_serializer(
             "media_content_type": {"type": "string"},
             "metadata": {"type": "object", "additionalProperties": True},
         },
-        "required": ["entity_id", "media_content_id", "media_content_type"],
+        "required": ["media_content_id", "media_content_type"],
     }
     assert selector_serializer(selector.NumberSelector({"mode": "box"})) == {
         "type": "number"

tests/helpers/test_selector.py

@@ -817,6 +817,23 @@ def test_theme_selector_schema(schema, valid_selections, invalid_selections) ->
             ),
             (None, "abc", {}),
         ),
+        (
+            {
+                "accept": ["image/*"],
+            },
+            (
+                {
+                    "media_content_id": "abc",
+                    "media_content_type": "def",
+                },
+                {
+                    "media_content_id": "abc",
+                    "media_content_type": "def",
+                    "metadata": {},
+                },
+            ),
+            (None, "abc", {}),
+        ),
     ],
 )
 def test_media_selector_schema(schema, valid_selections, invalid_selections) -> None: