CameraITS: Add reprocess noise reduction test

Add doReprocessCapture() to submit regular capture requests and use
the regular capture requests as the input for submitting reprocess
capture requests.

Add a test to verify noise reduction modes work as expected for
reprocess requests.

Bug: 20920487
Change-Id: I8c28ca103991c4b84d081c182d81e548c9c3b2e1
5 files changed