Telephony:Prevent duplicate auto mode request on EF_CSP read

Prevent duplicate auto network selection mode request
if triggered internally by Android due to
PLMN disabled in EF_CSP SIM record.
Allow mode change request if triggered by user.
CRs-Fixed: 301052

Change-Id: I9f6828e59abada64fab66d6ff747bf83a3ec4d6c