Remove OUString constructor where not needed.

Pattern used:

find . -name "*.cxx" -exec sed -i 's/\( *\)return \([^()]*\)\.equalsAsciiL( *RTL_CONSTASCII_STRINGPARAM *( *\([^)]*\) ) *);/\1return \2 == \3;/' \{\} \;

Originally there was m_bIsSubstream (true for footnotes, headers, etc.),
then we needed a pointer to the original stream, now the boolean value
is redundant, so remove it.

More removal of RTL_CONSTASCII_USTRINGPARAM in module sd

More RTL_CONSTASCII_USTRINGPARAM in module sd

Cleanup of some RTL_CONSTASCII_USTRINGPARAM macro in module sd

Includes too replacement < by != for comparison between current and end iterators

* The updatecheckui lib is part of that module; should its scp entry also be
marked ComponentCondition="ISCHECKFORPRODUCTUPDATES=1"?

* unpack_update (and other scripts as well?) need only be generated if
ENABLE_ONLINE_UPDATE.

* It is inconsistent that there is a distinct onlineupdate.xcd not merged into
main.xcd, while the updchk and updatecheckui component files are merged into
the global services.rdb.

* The updchk res file should also go into (a resource sub-module of) the
optional online update module.

rtl::OUString rtl::OUString::copy(sal_Int32) const: Assertion
`beginIndex >= 0 && beginIndex <= getLength()' failed.
(regression from dd2fe95c)