Keyguard: Fix SIM unlock progress dialog doesn't disappear issue

Sometimes the SIM unlock dialog can not be hidden, when the view is
re-inflated due to config change in KeyguardViewManager.

Dismiss the dialog, when KeyguardSimPinView is detached from window.

CRs-Fixed: 713577

Change-Id: I0c7bb79e5afed709c7258def73f5d12b9b702148