Merge "SharedMemory: clear file descriptor when explicitly closed."

core/java/android/os/SharedMemory.java

@@ -259,6 +259,9 @@ public final class SharedMemory implements Parcelable, Closeable {
             mCleaner.clean();
             mCleaner = null;
         }
+
+        // Cleaner.clean doesn't clear the value of the file descriptor.
+        mFileDescriptor.setInt$(-1);
     }
 
     @Override