Camera: Request for 2 snapshots in HDR Mode.

Request for 2 snapshots(1x exposure, HDR Processed) images to be
stored on the SD Card.

Change-Id: Ie7b553e7dd7bf8e03edcf9eb7c09c5e28bacc1ab
(cherry picked from commit 1eebfba9e64ce6800209933063bc50336102dfd8)
Merge "Camera: Request for 2 snapshots in HDR Mode." into jb4.3