SystemServer: Enforce ResolveIntentService behavior

If there are no services or more than 1 service, we want to detect it
early on in development and crash the whole process ASAP

Bug: 311772251
Bug: 366273182
Test: Boot devices + Bluetooth
Test: m Bluetooth
Flag: com.android.bluetooth.flags.enforce_resolve_system_service_behavior
Change-Id: I9862e2fc90deab09eece4f46e2d5714c502ecbbe