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
ClockActions: Dismiss Keyguard

Change-Id: I6542a0bd6bfb83790a5c67bd7eba82a31195250e