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

rs/java/android/renderscript/BaseObj.java

@@ -16,6 +16,7 @@
 
 package android.renderscript;
 
+import android.annotation.UnsupportedAppUsage;
 import dalvik.system.CloseGuard;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
@@ -73,6 +74,7 @@ public class BaseObj {
     final CloseGuard guard = CloseGuard.get();
     private boolean mDestroyed;
     private String mName;
+    @UnsupportedAppUsage
     RenderScript mRS;
 
     /**