Rewire dozing for clock events

Continuing exploration of moving all doze events to flowables,
including both isDozing and the dozeAmount animations. At the moment,
the source of these events still comes from StatusBarStateController,
which informs the KeyguardRepository. Next up is to create a parallel
way to drive these animations that is solely based on repository
information.

Bug: 242853098
Test: atest ClockEventControllerTest KeyguardClockSwitchControllerTest
Change-Id: I8c40076ad7e716093f602e5bbf5d9f03871ac679