Update test framework to support smartcam device discovery. (#1477)

Update test framework to support `smartcam` device discovery:
- Add `SMARTCAM` to the default `discovery_mock` filter
- Make connection parameter derivation a self contained static method in `Discover`
- Introduce a queue to the `discovery_mock` to ensure the discovery callbacks
  complete in the same order that they started.
- Patch `Discover._decrypt_discovery_data` in `discovery_mock`
  so it doesn't error trying to decrypt empty fixture data

tests/test_device_factory.py

@@ -60,13 +60,7 @@ def _get_connection_type_device_class(discovery_info):
         device_class = Discover._get_device_class(discovery_info)
         dr = DiscoveryResult.from_dict(discovery_info["result"])
 
-        connection_type = DeviceConnectionParameters.from_values(
-            dr.device_type,
-            dr.mgt_encrypt_schm.encrypt_type,
-            login_version=dr.mgt_encrypt_schm.lv,
-            https=dr.mgt_encrypt_schm.is_support_https,
-            http_port=dr.mgt_encrypt_schm.http_port,
-        )
+        connection_type = Discover._get_connection_parameters(dr)
     else:
         connection_type = DeviceConnectionParameters.from_values(
             DeviceFamily.IotSmartPlugSwitch.value, DeviceEncryptionType.Xor.value
@@ -118,11 +112,7 @@ async def test_connect_custom_port(discovery_mock, mocker, custom_port):
         connection_type=ctype,
         credentials=Credentials("dummy_user", "dummy_password"),
     )
-    default_port = (
-        DiscoveryResult.from_dict(discovery_data["result"]).mgt_encrypt_schm.http_port
-        if "result" in discovery_data
-        else 9999
-    )
+    default_port = discovery_mock.default_port
 
     ctype, _ = _get_connection_type_device_class(discovery_data)