camera: reducing af fail range
camera: reducing af fail range

Change touchAfAec-dx/dy to cover wider range.
It will prevent af fail.

Change-Id: I4b743caff83d7d5042e5afda3c81c08350a3f1d1

maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead