Fix AppPredictionService callbacks comparison

IPredictionCallback#equals() does not return true for the same callback
passed twice into the service. Compare callback binders instead.

Fix: 260650688
Test: manual test
Change-Id: Icbdbad54bd36bb8598054915a90424359f7d2863

core/java/android/service/appprediction/AppPredictionService.java

@@ -328,7 +328,7 @@ public abstract class AppPredictionService extends Service {
                 Slog.e(TAG, "Callback is null, likely the binder has died.");
                 return false;
             }
-            return mCallback.equals(callback);
+            return mCallback.asBinder().equals(callback.asBinder());
         }
 
         public void destroy() {