Camera: Add meta data types for meta data callback
and auto HDR Metadata type

- This type is used during auto HDR
  Metadata callbacks.

Conflicts:
	include/system/camera.h

Change-Id: Ifd6fd88c9345d12af8406e59ed209cb91677b9c1
Merge "Camera: Add meta data types for meta data callback and auto HDR Metadata type" into du44