smdk4412-common: camera: Don't set focus to FOCUS_MODE_TOUCH after taking a picture

After picture has been taken in stock camera app, FocusAreas is resetted to the center
of the preview screen, causing the HAL to detect the non (0,0,0,0,0) as a tap in the
screen.

Change-Id: Id41d108c6bb59a05a0a98efbaef51d14f50741fd
smdk4412-common: camera: release face detection memory when capture stops

Change-Id: I6724ce6dde3c4b6242a06b73808905a6de094d4a