Add @UnsupportedAppUsage annotations

For packages:
  android.graphics
  android.graphics.drawable
  android.graphics.drawable.shapes
  android.graphics.fonts
  android.graphics.pdf

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
Merged-In: I7fc1162d2c63df8751a4660607e8ce72070efed8
Change-Id: I5d7739d2d1fc7bb12ee059bcc2a9ac9017ca35fb