Upgrade fonttools to 4.16.1 am: 672f6949a5 am: 1f690a745a am: 280cd4ed46 am: 7b42609f36

Original change: https://android-review.googlesource.com/c/platform/external/fonttools/+/1479387

Change-Id: I53ec3a4ec48482d648e4528d78ce23c101348dee