audioflinger:Set correct device while creating effects

Change-Id: Id2c96c1f1fe4cdfc2795c86caa050f31f15e7f8d
  -Issue: Effectmodule is created with stale output device
  -Rootcause: While creating effects the output device set is
   output device of mixer thread, which is stale and
   not updated, so effects use the wrong/old device as
   the output device and leads to issue such as difference
   in volume level after setting correct device etc.
  -Fix: Cache the latest device value for direct track
   in a flinger member variable when setparameter of
   flinger is called with new device and
   audioflinger::openoutput is called.
   Use this cached value while creating effects
CRs-Fixed: 496866