camera: Add support for sending raw commands

 * Certain camera drivers need magic commands to select special modes
   such as ZSL or HDR. Add support for sending raw commands from
   applications.

Change-Id: I512a765c7a67ffd2877e465cf6493ffc2b3b54ac
Merge branch 'cm-10.1' into martincz
remove unused parameter

Change-Id: Icda5484e3d2cb1c8be049479e6a1b0e84c241dcd