Add @UnsupportedAppUsage annotations

For packages:
  android.text.util
  android.text.style
  android.text.method
  android.text.format
  android.text

This is an automatically generated CL. See go/UnsupportedAppUsage
for more details.

Exempted-From-Owner-Approval: Mechanical changes to the codebase
which have been approved by Android API council and announced on
android-eng@

Bug: 110868826
Test: m
Change-Id: I5be178ad05f2ff98bcf31e24cd4eb33961887c38
Merged-In: I9afbd4ca8826c37cb70db43252e39b9a674e5ae0