Upgrade fonttools to 4.19.0 am: f8d82f7a26 am: 104832b19d am: 5bd3cf43f5

Original change: https://android-review.googlesource.com/c/platform/external/fonttools/+/1559685

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iee510c4324036a9910e542f5889e939a944578a9