Fix issue where bouncer would go away

Activities with the flag FLAG_DISMISS_KEYGUARD_ACTIVITY will try to
dismiss the keyguard. In this case we should show the occluded bouncer.

Ideally we should not show the lock screen, but at this point,
ActivityManager still doesn't know if the keyguard should be dismissed
or not.

Test: manual, edit emergency information on EmercencyDialer
Test: runtest -x cts/tests/framework/base/activitymanager/src/android/server/am/ActivityManagerDisplayLockedKeyguardTests.java
Test: atest packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardBouncerTest.java
Test: atest packages/SystemUI/tests/src/com/android/keyguard/KeyguardHostViewTest.java
Change-Id: I65b40ae47319c522c13ed3dc9420bc15cb472430
Fixes: 74726131
Fixes: 74779270