Allow LocalServices to be overridden more than once.

This changelist allows LocalServices to be overridden multiple
times, which allows default LocalService setup to be changed within
tests.

This change also adds an additional test for PhoneWindowManager
to prevent

Bug: 401205442
Test: atest LocalServiceKeeperRuleTest
Test: atest PhoneWindowManagerTests#powerPress_hubOrDreamOrSleep_noDreamManager_noCrash
Flag: EXEMPT bugfix
Change-Id: I10cfd96757f7dd9953e3967a85bf43e3ef2d7f3c