Merge "Fix errorprone warnings that should be errors" am: 6d585ed7 am: 78a43f6c

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



Change-Id: Ie8d7a908adb83e2556d7b2d27beecc0e29978173
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>