Add TestApi annotation for isAidlHal()

Bug: 266169861
Test: vts
Change-Id: I70c50e932afe36b20f6c7eb478ae8008554ece2f

core/api/test-current.txt

@@ -1735,6 +1735,7 @@ package android.media {
 
   public final class MediaCas implements java.lang.AutoCloseable {
     method public void forceResourceLost();
+    method public boolean isAidlHal();
   }
 
   public static final class MediaCodecInfo.VideoCapabilities.PerformancePoint {
@@ -1745,6 +1746,10 @@ package android.media {
     method public int getMaxMacroBlocks();
   }
 
+  public final class MediaDescrambler implements java.lang.AutoCloseable {
+    method public boolean isAidlHal();
+  }
+
   public final class MediaRoute2Info implements android.os.Parcelable {
     method @NonNull public String getOriginalId();
   }

media/java/android/media/MediaCas.java

@@ -944,10 +944,11 @@ public final class MediaCas implements AutoCloseable {
     }
 
     /**
-     * Check if the HAL is an AIDL implementation
+     * Check if the HAL is an AIDL implementation. For CTS testing purpose.
      *
      * @hide
      */
+    @TestApi
     public boolean isAidlHal() {
         return mICas != null;
     }

media/java/android/media/MediaDescrambler.java

@@ -17,6 +17,7 @@
 package android.media;
 
 import android.annotation.NonNull;
+import android.annotation.TestApi;
 import android.hardware.cas.IDescrambler;
 import android.hardware.cas.ScramblingControl;
 import android.hardware.cas.V1_0.IDescramblerBase;
@@ -221,10 +222,11 @@ public final class MediaDescrambler implements AutoCloseable {
     }
 
     /**
-     * Check if the underlying HAL is AIDL. Used only for CTS.
+     * Check if the underlying HAL is AIDL. For CTS testing purpose.
      *
      * @hide
      */
+    @TestApi
     public boolean isAidlHal() {
         return mIsAidlHal;
     }