Bug#1025106: Phone crash in non-system-user mode after user input PUK code.

[root cause  ]SpecialCharSequenceMgr didn't check SystemUser in handlePinEntry method
[changes     ]phone crash in non-system-user mode after input PUK code
[issue address]https://partnerissuetracker.corp.google.com/u/0/issues/128496199

Change-Id: Ic3c53930c5ac11a972f02d21980f91c334d60901
2 files changed