Moves dump one level up for ClockEventController.

We need that because registering it as a dumpable is not allowed after a
separate instance of the same class has already been registered. We
register a second instance when we set up the clock for the lock screen
preview.

Bug: 202758428
Test: manually verified that the associated CL for the same bug works
now

Change-Id: I7568f0c096e0f3759b3ee82347cfbda2f4d66132