Fix errorprone warnings that should be errors am: b19663bf5e am: 8305b2e3ed am: 821494b2b2

Original change: https://android-review.googlesource.com/c/platform/external/javaparser/+/2256801

Change-Id: I8ceb045ddcbbef438ff2a3567dcccab39930d477
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>