[PATCH v2 0/5] MR10677: amstream: Test and fix media type enum on ddraw stream.

[Brendan McGrath (＠redmcg)]

This MR adds new tests and subsequent fixes for the type returned by `IEnumMediaTypes::Next` on the `IEnumMediaTypes` retrieved from the `IPin::EnumMediaTypes` function on the Direct Draw media stream.

--
  v2: amstream: Return connected media subtype in enum if connected.
      amstream: Return current format in media type enum.
      amstream/tests: Test enum media type on disconnect.
      amstream/tests: Test enum media type whilst connected.
      amstream/tests: Test enum media type with ddraw.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10677