Upgrade fonttools to 4.17.0 am: af6cd2e5e0 am: 7c16f49eb6 am: 06febd39f2 am: af68f781c3

Original change: https://android-review.googlesource.com/c/platform/external/fonttools/+/1498016

Change-Id: I43dc02a919ca5c8369a6d860709c1e5b6516d95e