AuthGraph: add fuzzer am: 6fb22dc9ef

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2817763

Change-Id: I38939c7f6c7dc9f8581a6b5284a80b877ded2b72
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>