Dt/task/swmaas 1533 fix repeating voice instructions 2

[dtran-phunware]

Context

QA reported voice instructions were repeating for the same step. This PR resolve the issue by ignoring onManueverChanged calls with the same position.

Description

• Added logic gate to ignore onManeuverChanged calls with same position as one that preceded it
• Added flags in RoutingActivity and NavOverlayView to determine where a maneuver originated from.
• Added comments for this potentially confusing logic flow

Notes

It is possible and valid for multiple instructions to be TTS and displayed on the Pager within rapid succession. As long as the instruction was different form the one that preceded it.

Screen Record https://drive.google.com/file/d/1JPw9EdAo0No5qC7ie2Evk5lLhiYn0Zcq/view?usp=sharing

[npike]

Do we need to update the other activities to implement dispatchManeuverChanged() instead of overriding onManeuverChanged()? (like WalkTimeActivity)