Take SIM lock status into account when coming out of airplane mode

When leaving airplane mode the statusbar display "Network search ..." as status text even
when the SIM card is actually locked. Now the SIM locked status is checked and the status
text is set to "SIM lock" when SIM card is still locked.

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>