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: Idd9e6c53ff7fc459d4b4ced5f1ba00571c26ac75