QCameraHWI_Parm: Update Exif code from mako

- set maker and model from build properties
- set DATE_TIME_DIGITIZED
- set focal length and Aperture
- set white balance
- set subsec time
QCameraHWI_Parm: add optimizations from mako

- setAEBracket
- setFaceDetect
- setFlash
- setWaveletDenoise
- setWhiteBalance
- setExposureCompensation
- setSceneMode
- supportsFaceDetection