Merge "Fix errorprone warnings that should be errors" am: 6d585ed76c

Original change: https://android-review.googlesource.com/c/platform/packages/inputmethods/LatinIME/+/2256807

Change-Id: I7d8662bdc880e331cf2d912dae7cc18b70743975
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>