Add local angle information to Measurement for tracking

[tvami]

Is your feature request related to a problem? Please describe.

This came up at today's tracking meeting, for dEdx in the tracker we'd need to know the local angles, but that's currently not available at each layer.

Describe the solution you'd like

Add new member variables that include the local angle information.

Describe alternatives you've considered

Having dx = sensor thickness, but clearly its more correct do calculate it based on the angle. I should also say that we attempted to use the global angles with @danyi211, that gives unphysical values.

Additional context

The dEdx dev issue is #1452