Revert "Util: Disable software HDR if the camera HAL actually supports it"

This reverts commit 39181f177cf8ca39c8c6eac44fd4c0f7d9d42fdf

Change-Id: I4a8fce626612d6f3657d4e5879a90e5181b077dc
Merge "Revert "Util: Disable software HDR if the camera HAL actually supports it"" into jb4.2