Revert "Use new UnsupportedAppUsage annotation."

This reverts commit a5264903e22bc741add895133474ea13a370de4c.

Reason for revert: Droidcop-triggered revert due to breakage https://android-build.googleplex.com/builds/quarterdeck?branch=git_master&target=sdk_phone_armv7-sdk&lkgb=6083299&lkbb=6085371&fkbb=6083313, bug b/146533269

Change-Id: Ie5b031d7b277cf0e09b0a9776b26bf74f5f69e70
diff --git a/rs/java/android/renderscript/Mesh.java b/rs/java/android/renderscript/Mesh.java
index 826225a..5321dcb 100644
--- a/rs/java/android/renderscript/Mesh.java
+++ b/rs/java/android/renderscript/Mesh.java
@@ -16,8 +16,7 @@
 
 package android.renderscript;
 
-import android.compat.annotation.UnsupportedAppUsage;
-
+import android.annotation.UnsupportedAppUsage;
 import java.util.Vector;
 
 /**