cade0049a7
In certain cases when lockscreen is constructed in landscape and then switches to portrait on the phone, it inflates new views for KeyguardHostView. The old views never call onPause() in KeyguardFaceUnlockView so it was still getting callbacks and starting Face Unlock multiple times. By removing the callbacks in onDetachedFromWindow() there won't be multiple instances of KeyguardFaceUnlockView receiving callbacks and starting face unlock. Change-Id: I00d770283e83be2f4b76e00340123789a8075091