audio: fix for volume burst during FM device switch

- Issue: Volume burst is heard during device switch
  (headphone and speaker) for FM playback
- Root cause: delayMs passed to CheckAndSetVolume is
  not applied for FM playback
- Fix: Double delayMs and apply FM volume with this delay

Change-Id: Ib7c7bd59ed584f85ea79a7606c635d60dffa3471
CRs-Fixed: 526553