Add @UnsupportedAppUsage annotations

For packages:
  android.renderscript

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: I016f6e720e79c48afe44f4690b5dd99fc81ae780
Merged-In: I1aa8ebca448547031b426a7b305c5c3d6fcf2652