SystemUI: Fix device keeps showing "Phone is starting"

After device's pattern lock and SIM Card's PIN lock are settled,
reboot and we can see screen keeps showing "Phone is starting".
During the process of showing SIM Pin lock, SIM Pin class handle
"Absent" event and dismiss keyguard. That keyguard has been hidden
will trigger system resume the FallbackHome activity. The FallbackHome
activity will show "Phone is starting" and leads to this issue.

Remove the code for ABSENT in KeyguardSimPin/Puk class to fix it.

Change-Id: I55e41f2d79fe057e413dd2724f504be8867040e5
CRs-Fixed: 2503092