Add a small service to the high level core set of system services to
control the configuration of the native common time service. This
service is responsible for controlling policy regarding when the
common time service should be allowed to run, which networks it is
allowed to run on, what priority it runs at in the master election
algorithm, and so on.
Change-Id: I37308e882a0e8c4cd3e38c4f47b7c40b9150ba31
7d6934f3eb