docs: fix "buidler" typos in Typeface.Builder am: 8aeade4629 am: f36f2de31a am: 88dce482e3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/9975934

Change-Id: Id17dd42b36327534837996e9eaf1fc75b5a5f3b7