Add device entry icon support for OCCLUDED => DOZING transition

Fixes: 357522464
Test: Enroll UDFPS; disable AOD; post a notification
via the Notify.apk (delayed 5s); lock device; double press
power button for camera app; press power button to sleep (dozing);
when notification arrives, observe device entry fp icon while dozing
Flag: EXEMPT bugfix

Change-Id: Id61feb3cda792de6a12f5546a3e227cc65e32b4a