Fix ProfilesBasePreferenceControllerTest NPE

Change Extended mockito from mockStatic() to spyStatic() to try to
prevent NPE

Bug: 228083767
Test: atest CarSettingsUnitTests:com.android.car.settings.profiles.ProfilesBasePreferenceControllerTest#onCreate_populatesUsers
Change-Id: Ia53a320ffdc1ccb737f0f25a2a963461ddef28c9
1 file changed