Two Camera Support in Camera Mediation

A functionality deployment to support two camera/ camera switch
in camera mediation of CIV

Changes done:
-Open and Close camera were implemented as functions
-Physical nodes were used to retrieve frames
-Switch command from Camera Vhal was handled
-Mismatched calls from Camera Vhal was handled

Tracked-On: OAM-104829
Signed-off-by: pillaive <venkatesh.pillai@intel.com>

Author: pillai45