Upgrade fonttools to 4.18.2 am: c89ead6a8a am: 214df0141a am: 0e323aacb6

Original change: https://android-review.googlesource.com/c/platform/external/fonttools/+/1531918

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9de7406be32ca6fae2858be1c78119db3ae42eba