Camera: Video HDR Feature Integration.

Added framework support for camera applications to query supported
video HDR modes and set the required mode.

Change-Id: Ie318e586838a2f035e59e30fa51af35b52f7c886
Camera: Adds support for meta data callbacks

- This change adds a new type of callback
  that will be called when there are pending
  meta data notifications.

Change-Id: I84f5cbafe4f023c7b0efa9ec8620756b0eaa428d
Frameworks: Enhance face detection

Add support for facial processing features:
smile detection, gaze detection and blink detection

Change-Id: Ic186ff0658e755a8b5287cffa1dd58d9eafebc9a
Frameworks: QCFace framework added

Add framework support for extended face detect

Change-Id: I2a1c477ee6d11f2b9764966abbb85ede9100fe91
Camera: Adds support for longshot configuration

- The Camera API is extended with one additional
  call for longshot mode configuration.

Change-Id: If3bcad003facae22ec2bd690480dc3db63f0b28a