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/RenderScriptCacheDir.java

@@ -16,6 +16,7 @@
 
 package android.renderscript;
 
+import android.annotation.UnsupportedAppUsage;
 import java.io.File;
 
 /**
@@ -30,11 +31,13 @@ public class RenderScriptCacheDir {
      * @hide
      * @param cacheDir A directory the current process can write to
      */
+    @UnsupportedAppUsage
     public static void setupDiskCache(File cacheDir) {
         // Defer creation of cache path to nScriptCCreate().
         mCacheDir = cacheDir;
     }
 
+    @UnsupportedAppUsage
     static File mCacheDir;
 
 }