[flexiglass] Update showBouncer logic to attemptDeviceEntry

Bug: 308819693
Test: [Flexiglass] Tap on a notification (with an intent) when security
is set to swipe. Notification intent gets launched and
keyguard is dismissed. Previously, empty primary bouncer
would show.
Test: atest StatusBarKeyguardViewManager
Flag: com.android.systemui.scene_container

Change-Id: I48cc487d8ce51eb6b980a673da444c20036b79b6