some small RTL_CONSTASCII_STRINGPARAM cleanups

Change-Id: Ia701b174288647d3451fbb487d46882452ded821
remove unnecessary RTL_CONSTASCII_STRINGPARAM in OString::equalsIgnoreAsciiL

Convert code like:
    aStr.equalsIgnoreAsciiCaseL(RTL_CONSTASCII_STRINGPARAM("XGRAD_SEQ_BEGIN"))
to:
    aStr.equalsIgnoreAsciiCase("XGRAD_SEQ_BEGIN")
which compiles down to the same code.

Change-Id: Ia69289d853d292b2f27b68863cb6f6ecdbf1a71e
remove unnecessary use of OUString constructor in equalsIgnoreAsciiCase

Convert code like:
    sType.equalsIgnoreAsciiCase(OUString("VIEW"));
to:
    sType.equalsIgnoreAsciiCase("VIEW");

Change-Id: I6fb47e6a83b561c7e5a25da76b63606a3174858d
remove unnecessary RTL_CONSTASCII_STRINGPARAM

A final pass through the code, converting code to use the new
OUString and OString methods that can detect string literals.

Change-Id: Ifa6382335e5650a1c67e52006b26354e0692c710