Merge "Add comment for unknown rotation type"

    const uint32_t type = transform.getType() | (transform.getOrientation() << 8);

    transformProto->set_type(type);

    // Rotations that are 90/180/270 have their own type so the transform matrix can be

    // reconstructed later. All other rotation have the type UKNOWN so we need to save the transform

    // values in that case.

    if (type & (ui::Transform::SCALE | ui::Transform::UNKNOWN)) {

        transformProto->set_dsdx(transform[0][0]);

        transformProto->set_dtdx(transform[0][1]);