Switch to KeyguardManager.isDeviceSecure.
Switch to KeyguardManager.isDeviceSecure.

isKeyguardSecure also returns true when SIM PIN is required. We don't
care about that because entering SIM PIN does not unlock keys
requiring user authentication. isDeviceSecure returns true only if
secure lock screen is set up, which is exactly what we want.

Bug: 18088752
Change-Id: I47b21f3351f55c11e8e9bcfd7654762973dd9271

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base