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
diff --git a/rs/java/android/renderscript/Element.java b/rs/java/android/renderscript/Element.java
index 0941907..f671953 100644
--- a/rs/java/android/renderscript/Element.java
+++ b/rs/java/android/renderscript/Element.java
@@ -51,7 +51,12 @@
  * <p>For more information about creating an application that uses RenderScript, read the
  * <a href="{@docRoot}guide/topics/renderscript/index.html">RenderScript</a> developer guide.</p>
  * </div>
+ *
+ * @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 Element extends BaseObj {
     int mSize;
     Element[] mElements;