Feat: Make it smoother to switch between nearby and explore maps (commons-app#6164)

* Nearby: Add 'Show in Explore' 3-dots menu item

* MainActivity: Add methods to pass extras between Nearby and Explore

* MainActivity: Extend loadFragment() to support passing fragment arguments

* Nearby: Add ability to navigate to Explore fragment on 'Show in Explore' click

* Explore: Read fragment arguments for Nearby map data and update Explore map if present

* Explore: Add 'Show in Nearby' 3-dots menu item. Only visible when Map tab is selected

* Explore: On 'Show in Nearby' click, navigate to Nearby fragment, passing map data as fragment args

* Nearby: Read fragment arguments for Explore map data and update Nearby map if present

* MainActivity: Fix memory leaks when navigating between bottom nav destinations

* Explore: Fix crashes caused by unattached map fragment

* Refactor code to pass unit tests

* Explore: Format javadocs

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Co-authored-by: Nicolas Raoul <[email protected]>

Author: 2 people