Refer to offical spec for trace file format.
Remove some logspam.
Wrap at 80 chars, remove trailing whitespace.
Add settings button to action bar in dashboard view.
Trigger connected/disc. callbacks when a trace is stopped/started.
Pull pipeline activity check up to a function.
Make sure a stopped network source calls disconnected callbacks.
Simplify VehicleManager with a 2nd pipeline.

This allows us to control the background service notification based on
user source activity, e.g. trace file source.
Update android maven plugin to version compatible with Maven 3.1.1.