Add support for creating recordings to Stream Buffer Sink property page

[mikecopperwhite]

The Stream Buffer Sink property page already supports setting profiles that can be read in other graphs by the Stream Buffer Source filter.

Extend this to support creating permanent recording files that can be read by the Stream Buffer Source.

[mikecopperwhite]

Not all features of Stream Buffer Engine implemented. In particular GSN only currently edits one graph per process so we can't currently support Stream Buffer Sink and Source within the same process.