Performance: Postpone service restart during app launch.

In the android framework, when the service gets killed,
it will be rescheduled. Postpone the service restart if
the app is in process of startup. By Default this feature
is disabled. It can be enabled from build.prop of target.

Change-Id: Ia86edf027e20df2c7aa6f34e3aa293f7a8e6f1fa