ActiveAE: fix shifting bits for AE_FMT_S24NE4
WASAPI: fix drain after new GetDelay
AE: clean out old GetDelay
AESinkPi: drop obsolete method GetCacheTime
Merge pull request #4943 from FernetMenta/aefixes

Aefixes
Merge branch 'master' of https://github.com/xbmc/xbmc