Revert "Add QCOM Staff"

This reverts commit f9f46725eb314ede093dee6f4cf78dd5ba03a54d.
Revert "Add SCENE_MODE_OFF"

This reverts commit 178b47621b0e005663cfafa8221227eccd5c1aa8.
Revert "Camera: QCOM legacy definitions,HTC cam switch,NO_UPDATE_PREVIEW"

This reverts commit 0f0f04a6a87a96b330d163daf0f6c37e6505bb5d.