Fix cyclic keyguard state notification

We should not not notify that the keyguard faded away
when a transition is cancelled. Another transition is
already happening and the message will be receive when
it finishes.

Change-Id: I4d2e227027a02f2168578bc1d201a4cf8672097d
Fixes: 70316977
Test: Double tap power button on the lock screen and aod
Test: Unlock with fingerprint from aod and lock screen
Test: Unlock with PIN
Test: Unlock from "pulsing" (AoD2) with fp or by tapping notification