Add @UnsupportedAppUsage annotations

For packages:
  android.app.admin
  android.app.backup
  android.app.job
  android.app.usage
  android.content
  android.content.om
  android.content.pm

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: Id84ee490f3435a196fca10a89bda9f7217b750c6