[WIN32][WASAPI] fixed: short noise on start when using stream silence.
[WIN32][WASAPI] created a drain method.
[WIN32][DirectSound] added fake entry default and make sink understand it.
ActiveAE: improve keep alive receiver
Revert "[WIN32][WASAPI] fixed: short noise on start when using stream silence."

This reverts commit 31c142c62302c8df418c1029da4d2230189e4f6b.