remove redundant calls to OUString constructor

Change code like this:
  aStr = OUString("xxxx");
into this:
  aStr = "xxxx";

Change-Id: I31cb92e21658d57bb9e14b65c179536eae8096f6
remove redundant calls to OUString constructor in if expression

Convert code like:
  if( aStr == OUString("xxxx") )
to this:
  if( aStr == "xxxx" )

Change-Id: I8d201f048477731eff590fb988259ef0935c080c