Annotate two non-SDK methods known to be used by apps

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

Bug: 121237128
Bug: 120783643
Test: m appcompat
Change-Id: Ib7a8bdf3151290aa8a5ca85dc8650612432f0d59