docs: Edited API documentation related to line-break and line-break word styles.

Files patched from CL 19608033, https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/19608033.
Could not cherry-pick CL because LineBreakConfig.java on master contains Android U code.

Staged to:

https://android.devsite.corp.google.com/reference/android/widget/TextView

https://android.devsite.corp.google.com/reference/android/R.attr

https://android.devsite.corp.google.com/reference/kotlin/android/R.attr

Test: Built API docs
Change-Id: Ie322096ee2cc0ab3e24bb7d2ff8c398e8861726f