Add V4L2 Control Factory

Also moves all control factory methods into a separate file.

BUG: 30900438
TEST: unit tests pass
Change-Id: I885903d8e23a548b63fd20006568145a233c0316
7 files changed
tree: 4aea4ab797fca0cf0ba23f12dce46149fec992d6
  1. modules/