Add a fuzz target to test DNG image parsing in dng_sdk. am: 0c2c0ca07a am: 49be9325f2

Original change: https://android-review.googlesource.com/c/platform/external/dng_sdk/+/1487679

Change-Id: Ibb9abf8881e295bd58423d201bc7e6ee0540f0c2