cc4104fd71
When switching users, Face Unlock starts in onResume(). However, there is no signal to indicate when the user actually sees their unlock screen. This means Face Unlock could be running unseen, timing out soon after it becomes visible, or letting the user in before they see the preview. This fix simply suppresses Face Unlock immediately after switching users. This is not the ideal behavior, but there is no easy way to make Face Unlock start only after the unlock screen becomes visible. When the user changes screens it becomes unsuppressed, so if they go back to the multi-select widget screen or login, Face Unlock works as expected and is only suppressed again when the user is switched. Change-Id: I80a302b0aefc1dee3c2dc77557978cbe062de435