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
Camera: add ISO mode support

Change-Id: Ied2075f950269990d836fc768b2c6c36088d494f
Merge "camera: Add support for sending raw commands" into android-4.4
Camera: Add support for QC camera features.

Added APIs and keys for all QC features. This
will enable application to get/set paramters.

Change-Id: I58a53c7b9133a3acddc34b268dac086c9562d533
Merge remote-tracking branch 'omni/android-4.4' into android-4.4