Add some sanity checks

Bug: 19400722
Change-Id: Ib3afdf73fd4647eeea5721c61c8b72dbba0647f6

 virtual void disconnect() {
 Parcel data, reply;
        data.writeInterfaceToken(
 IMediaHTTPConnection::getInterfaceDescriptor());

        remote()->transact(DISCONNECT, data, &reply);
 }

 virtual void disconnect() {
 Parcel data, reply;
        data.writeInterfaceToken(
 IMediaHTTPConnection::getInterfaceDescriptor());

        remote()->transact(DISCONNECT, data, &reply);
 }
