[IntrusionDetection] Add flag to gate callback fix

SecurityLogMonitor fixed the internal event callback
at b/385730709 so logs are received correctly by
the system server.

Create a flag to add the internal event callback
to Intrusion Detection.

Bug: 389732143
Flag: android.security.internal_log_event_listener
Test: N/A
Ignore-AOSP-First: security feature
Change-Id: Ic8a0f7e61cd9edee90d84a0825de2bedd25f942d