Fix a crash when registering/unregistering a smartspace timer listener.

Bug: 322860683
Fix: 322860683
Test: atest CommunalSmartspaceControllerTest
Test: atest CommunalInteractorTest
Flag: ACONFIG com.android.systemui.communal_hub STAGING

Change-Id: I6b3eadb3529ecf86d23b8777705d54fe742b34b1
1 file changed