we will need the length anyway, and in the case that its constructed
from OString then that strlen can be elided. (For the const char* case
then std::string_view[4] will compute the len)
Change-Id: Ifc06595573625cf93f07dd72ceec8a20745e12f9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/182123
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>