Add @UnsupportedAppUsage annotations

For packages:
  android.providers.settings
  android.provider

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: I993adf36dc31a5e224e88217c9e8dc140b6ba880
Merged-In: I3865ac184fcb6f52c6bfab9729611b065b27722e