Deprecate RS Java APIs.

This CL marks RenderScript Java APIs as deprecated.

Bug: 168711199
Test: m
Test: CtsRenderscriptTestCases
Test: CtsRsCppTestCases
Test: CtsRsBlasTestCases
Change-Id: Id271a794679d445c480d62c87ae6c8150f6901f8
Merged-In: Id271a794679d445c480d62c87ae6c8150f6901f8
(cherry picked from commit 8b4548c43a06290b5d9446c0235e65f21e9bfe5d)
diff --git a/rs/java/android/renderscript/FieldPacker.java b/rs/java/android/renderscript/FieldPacker.java
index de1c497..aaa0fe8 100644
--- a/rs/java/android/renderscript/FieldPacker.java
+++ b/rs/java/android/renderscript/FieldPacker.java
@@ -26,7 +26,11 @@
  * reflected code generated by the RS tool chain.  It should not
  * be called directly.
  *
+ * @deprecated Renderscript has been deprecated in API level 31. Please refer to the <a
+ * href="https://developer.android.com/guide/topics/renderscript/migration-guide">migration
+ * guide</a> for the proposed alternatives.
  **/
+@Deprecated
 public class FieldPacker {
     public FieldPacker(int len) {
         mPos = 0;