SnapdragonCamera: Split clearsight processImage

Split processImage routine into two using new Clearsight API.
Unlock and allow user to capture new image after Clearsight
finishes processing memory portion. Run the remaining processing
in the background while user is allowed to capture new image.

CRs-Fixed: 993611
Change-Id: I0213eb6904a9430d26dca681ed6fb653db3f571c
1 file changed