[RhB] Add Stream Flags key to setParameters

Audio Route Manager needs to know the type of stream to take the
appropriate routing decision (eg direct Output, MP3 Offload).
It must be define as key and filled by the policy.

Change-Id: I5d2273971ba8d279f3bbda1db811a39e99d3357f
Origin-Change-Id: Iffbf048a1025f222291ea71115913a3694a3a08a
Signed-off-by: Francois Gaffie <francois.gaffie@intel.com>
Signed-off-by: Jian Luo <jian.luo@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 70126