Turn on warnings and errors in common_time.
Fix a code path in CommonTimeServer::handleSyncResponse in which
and uninitialized variable is returned.
Change-Id: I2f80f063c625f032266647d0507f573370202707
Refactored the directory structure so that services can be optionally
excluded. This is step 1. Will be followed by another change that makes
it possible to remove services from the build.
Change-Id: Ideacedfd34b5e213217ad3ff4ebb21c4a8e73f85