Merge "codec2: unlock GraphicBuffer if lockYCbCr succeeded but could not process it" am: 9313acc2

            // We really don't know what this is; lock the buffer and pass it through ---

            // the client may know how to interpret it.

            // unlock previous allocation if it was successful

            if (err == OK) {

                err = GraphicBufferMapper::get().unlock(mBuffer);

                if (err) {

                    ALOGE("failed transaction: unlock");

                    return C2_CORRUPTED;

                }

            }

            void *pointer = nullptr;

            err = GraphicBufferMapper::get().lock(

                    const_cast<native_handle_t *>(mBuffer), grallocUsage, rect, &pointer);