Reset override when manually activating a manually deactivated zen rule

The behavior is now symmetric to the STATE_FALSE case (where manually deactivating a manually activated rule will reset the activate-override instead of placing a deactivate-override).

This should fix the scenario where the user stops Bedtime Mode after it's automatically activated at night and then resumes it -- the user most likely expects Bedtime to stop at its scheduled time in the morning.

Bug: 333527800
Test: unit test + cts + manual
Flag: android.app.modes_ui
Change-Id: Ie42cbcae89050f0c775828ebf4596d9fe939736a