Use composition instead of inheritance to define map and map control UIs and behaviors

[gino-m]

trafficstars

@shobhitagarwal1612 @JSunde, rough design:

[shobhitagarwal1612]

What does MapControlsFragment and MapControlViewModel do?

[gino-m]

What does MapControlsFragment and MapControlViewModel do?

These would encapsulate all the controls that get overlaid on the map:

• Location lock
• Layers button
• Any other controls we might end up adding which can be used across map experiences

MapContainerFragment would be responsible for wiring up MapControlsViewModel to MapViewModel.