Fix errorprone warnings that should be errors am: 6a791f63ce am: 4fd26e3017 am: 5f25573c1a

Original change: https://android-review.googlesource.com/c/platform/external/jackson-annotations/+/2254822

Change-Id: Ie87b724c5a4f8a0af73c4c8f9950fe394c49a8e7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>