Camera: Return true when more than one post processing parameter is enabled

Code change to deliver the frame to post processing framework
when more than one postprocessing is enabled

CRs-Fixed: 312916
Change-Id: I64ac6626679ebd16999ef207f823ae2e0b7c9bc9
Signed-off-by: Manogna Reddy Alle <cmalle@codeaurora.org>