Merge "Camera: Allow preview operation of SCENE_MODE_HDR" into nyc-dev
am: cfb4b10

* commit 'cfb4b10ad5b3b43d56939371b0a9c13824395ac1':
  Camera: Allow preview operation of SCENE_MODE_HDR

Change-Id: I204b761a14d266773d1db5e55cf58ac05726407b