Camera HAL: Fixes for Face prioritized 3A, cancelAF

1. Face prioritized 3A is enabled for AF, AE (for AE it is disabled)
2. White balance modes, exposure are allowed to be changed when face detection is ON
3. Focus metering area is ignored when face detection is ON
4. CancelAF is fixed to not retain the focus mode for CAF and infinity modes

Change-Id: I43650069d4de95815381974072f5b9afabf4fc46
Signed-off-by: Sundar Raman <sunds@ti.com>
4 files changed