incidentd sections for userdebug and eng are compiled out

Previously, the decision to include or not include them was
done at runtime. This changes them to be behind a compile
time flag. It's just safer, because the code just isn't there
instead of being dependent on a system property.

Test: bit GtsIncidentManagerTestCases:*
Bug: 123543706
Change-Id: If4e611914a7b0acd399ae27e55af8f718aee3ec8