camera2: Add RAW/JPEG comparison test.

- Compare patches from rendered RAW images with corresponding
  JPEG images generated by the camera pipeline for the same
  frame.
- Add RAW rendering utilities to CTS for working with RAW16
  buffers.

Bug: 18374258

Change-Id: I1660e666f8856d3017a86074a14e7f6438bf8658
5 files changed