Use OUString::startsWith where possible
Use OUString::startsWith where possible

Change-Id: I3f3b7b3600aa097187b05e21c375d087a2fa92bb

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core