[PATCH v3 0/2] MR2690: mfreadwrite/tests: Add more tests for MFCreateSinkWriterFromURL.

[Ziqing Hui (＠zhui)]

The tests shows that, for sink writer created by MFCreateSinkWriterFromURL,
we are not able to grab the media sink object immediately after the creation,
unless the media sink object can be created without setting media type(MP3, ASF).

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  v3: mfreadwrite/tests: Test GetService for MP4 sink writer.
      mfreadwrite/tests: Add more tests for MFCreateSinkWriterFromURL.

https://gitlab.winehq.org/wine/wine/-/merge_requests/2690