ril: Fix network operator search

Newer RIL versions have more QAN elements so we need a way
to adjust them to the correct value.

This needs to be set to same value as mQANElements in the RIL Telephony
class.

Change-Id: Icfad9c0acf1b95f63c232b6c4c49ed52bd4e3aa4
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>