Revert "MemoryIntArray: don't double close."

The reverted change causes a regression where we can get an IllegalStateException
during finalization as we are adopting the native fd in a ParcelFileDescriptor
which takes ownership of the fd. However, the order of finalization is undefined
and if the ParcelFileDescriptor is finalized before the MemoryIntArray we would
get an exception when running the finalization of the latter.

This reverts commit 89dfbfa269.

bug:124056170

core/jni/android_util_MemoryIntArray.cpp

@@ -142,6 +142,8 @@ static void android_util_MemoryIntArray_close(JNIEnv* env, jobject clazz, jint f
         jniThrowException(env, "java/io/IOException", "ashmem unpinning failed");
         return;
     }
+
+    close(fd);
 }
 
 static jint android_util_MemoryIntArray_get(JNIEnv* env, jobject clazz,