Fix crash when running UserSwitcherControllerTest

Previously, test would fail on wembley with the following errors:

 - No service published for: fingerprint

 - No service published for: face

 - java.lang.AssertionError: expected:<1> but was:<0>

Fixes: 191280089
Bug: 194441567
Test: atest SystemUITests:com.android.systemui.statusbar.policy.UserSwitcherControllerTest
Change-Id: I34539a5e9678b308b4d3a03e4593fb9385e7831f
Merged-In: I34539a5e9678b308b4d3a03e4593fb9385e7831f