camera: add Morpho DNR support

-- Use to Morpho DNR (Digital Noise Reduction) for low-ligth conditions (under
   50lux).
-- Remove logspam

Bug: 7131846
Bug: 7138612
Change-Id: Ie8b66ddb0307ec5f779d60033eae766ed12b13ed
Signed-off-by: Iliyan Malchev <malchev@google.com>