[PATCH 0/1] MR1923: faudio: Purge and clear notifcations on ShutDown

[Alistair Leslie-Hughes (＠alesliehughes)]

Wine-bug: https://bugs.winehq.org/show_bug.cgi?id=54264

cherry-picked upstraem 16f86bffec36b6e82e5c93d5f04ebc4ee4f980ab.