Camera: Enable HDR mode

* Trigger HDR mode when HDR Scene mode is selected

* Skip raw and jpeg images for HDR

  Native HDR solution generates 3 RAW images and 2 JPEG images, whereas
  camera service only expect 1 RAW and 1 JPEG image. Add the frame skipping.

Change-Id: I083e8e5ae8245146a6e62fb96e9ca5b9a9a9f309
3 files changed