Remove run test annotation from KeyguardClockSwitchControllerBaseTest

This fixes an initializationError error after merging the change to
refactor the test KeyguardClockSwitchControllerTest, as there are
no test cases to run in the base class.

Bug: b/285061111
Test: atest SystemUITests:com.android.keyguard
Change-Id: Ifd62c8eccad435cf225de830b06fb0beb488d9f8