message: Change HybridEncryptWrapper class visibility to public
  For symmetry reasons.
diff: @@ -29,7 +29,7 @@ import java.security.GeneralSecurityException;
  * it uses the primary key in the keyset, and prepends to the ciphertext a certain prefix associated
  * with the primary key.
  */
  -class HybridEncryptWrapper implements PrimitiveWrapper<HybridEncrypt, HybridEncrypt> {
  +public class HybridEncryptWrapper implements PrimitiveWrapper<HybridEncrypt, HybridEncrypt> {
  private static class WrappedHybridEncrypt implements HybridEncrypt {
  final PrimitiveSet<HybridEncrypt> primitives;
  