HIDL stuff to TestApi.

Since the CTS test for android.os is build with test_current.

Bug: 78650449
Test: android.os.cts
Change-Id: If784f4949af931c6c4efc284f1d16414705fe2d4
diff --git a/core/java/android/os/HwParcel.java b/core/java/android/os/HwParcel.java
index 7a51db2..7919a00 100644
--- a/core/java/android/os/HwParcel.java
+++ b/core/java/android/os/HwParcel.java
@@ -18,6 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.SystemApi;
+import android.annotation.TestApi;
 
 import libcore.util.NativeAllocationRegistry;
 
@@ -28,6 +29,7 @@
 
 /** @hide */
 @SystemApi
+@TestApi
 public class HwParcel {
     private static final String TAG = "HwParcel";