Cache SIM PIN for verification after unattended reboot.

Bug: 160784387
Test: manual
Change-Id: Iab402b2651b9dac78f3d40d5bea9b929d31db54d
Merged-In: Iab402b2651b9dac78f3d40d5bea9b929d31db54d
(cherry picked from commit 5e41151a1ca9f5f2fa6c92bef55d14c682269a99)
2 files changed