connectivity: Use appropriate OUString functions on string constants

Change-Id: I10b2ddf9dcc83219fea8eb55783507eed52702e8
desktop: Use appropriate OUString functions on string constants

Change-Id: I5791c212a103fe9c2a5376545944a70454b28bdd
extensions: Use appropriate OUString functions on string constants

Change-Id: I2476f409604d69e8e8ea1a132cd0a9169b5d435e
framework: Use appropriate OUString functions on string constants

Change-Id: I72bb5ff2ab8a55061072fde567fcc1c4a8e20a2f
sax: Use appropriate OUString functions on string constants

Change-Id: Ic0750322439f15e6c9b99dac9dbb3b8c060ad8e0
sfx2: Use appropriate OUString functions on string constants

Change-Id: I28ca30da980b81dbf3328495291916afca654999
svx: Use appropriate OUString functions on string constants

Change-Id: Ia012f2bec767cd7e7d2be9502062bea0b085fea0
ucb: Use appropriate OUString functions on string constants

Change-Id: I6839e032c981fcff472f29c51c84503d6370fd1c