Enable compat checking & lint for system_services api

These were previously turned off as there were no previous
releases to compare it to. Check in empty files as comparison.

Whitelist current lint problems for now (filed bugs to follow-up).

Bug: 149818061
Bug: 149818284
Bug: 147559833
Test: m checkapi
Change-Id: Ib4cbc84ac9a826f7b947c951c94f8f5578f4554d