Make "strict zen component validation" less strict

If we detect an invalid CPS or configuration activity in the AutomaticZenRule, we clear it out instead of throwing. (Although we still enforce that at least one of them must be valid).

Bug: 420605963
Test: atest NotificationManagerZenTest
Flag: com.android.server.notification.strict_zen_rule_component_validation
Change-Id: I7bee2c161911d6aa3fda9c24c9c0d7ba580352bc