Fix lint errors in tools/hiddenapi am: f16a93c5b2 am: 5705a1f7ee

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1580532

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I25553707d34b70d05abc250bdb0a55c1c66da4b5