Fixed SMP pairing failure due to race condition
Priti Aghera authored
SMP pairing failure if remote send security request before master
side receive LE link connection callback. The racing condition will
cause master side bonding failure upon ignoring remote security request
and flush out all SMP information. Retain SMP information when a
locally initiated pairing is in process solves the problem.

Bug: 17412687
Change-Id: Ia2256160c866413f93c6f49e5db82b4c6489d9d2
98283bb8