Camera: HDR: convert YUV422P / YV16 format to JPEG

Change-Id: I6310793e5e2d10e2d5e3d374aafe9761273259fc
Camera: HDR: fix low exposure on samsung hardware.

/* samsung actually speficify max HDR range via exposure compinsation */
Change-Id: I48b31965cf5acb6b9abcd2a62b1d341bfcab649c