[PATCH 0/3] MR5130: mfmediaengine: Implement IMFMediaEngineEx::SetCurrentTime/Ex().

[Zhiyi Zhang (＠zhiyi)]

This is a split from MR3572. It's needed for Underworld Island (2150830) video seeking.

Changes compared to the patches in MR3572:
1. Avoid making session state changes when in paused state.
2. Add tests to show that the MF_MEDIA_ENGINE_EVENT_SEEKING notification is most likely blocking because notify->seeking_event_received is TRUE right after a SetCurrentTime() call. Same for MF_MEDIA_ENGINE_EVENT_TIMEUPDATE when in paused state.