Replaced by getUsers() when exlcudeDying was hardcoded to false, or
getUsers(true, excludeDying, true) when it was a variable.
This refactoring will help replacing getUsers(true) to getAliveUsers().
Bug: 157921703
Test: m
Test: atest atest LockscreenFrpTest LockSettingsServiceTests SyntheticPasswordTests
Change-Id: I139462ab329fe46d8136eae0a39ac071a7e019db