Nearby: persist place-type filters across tab switches (Fixes #6486)

[XinyuYangYXY]

Fixes #6486

What changes did you make and why?

When switching away from Nearby and returning, the place-type chips remained visually selected but the map/list reset to unfiltered pins.
This PR ensures the selected place-type filters are persisted and restored within the same app session:

• Persist selection on every change
  In NearbyFilterSearchRecyclerViewAdapter:

  • After toggling a chip, call NearbyFilterState.setSelectedLabels(new ArrayList<>(selectedLabels)) and then callback.filterByMarkerType(...).
  • After Clear (setRecyclerViewAdapterItemsGreyedOut) and Select all (setRecyclerViewAdapterAllSelected) operations, also update NearbyFilterState to keep state consistent.

• Restore selection on Nearby init
  In NearbyParentFragment:

  • Introduce restoreStoredFilterSelection() and call it from initNearbyFilter() to re-apply saved labels to Label enum states and the adapter, then notifyDataSetChanged() so the UI, map, and list stay aligned with the saved filters.
  • Reset searchView state (de-iconify, clear query, remove focus) to avoid stale focus interfering with sheet/filters.

Scope: persistence is within the current app session.

Tests performed (required)

• Build variant: debug-main (Commons app 6.0.2-debug-main~4ed9ad508)
• Android device: Android 15 (API 35) emulator (Medium Phone)

Manual scenarios
1.Open the app and grant location permission.
2.Go to the Nearby tab.
3.Select one or more place-type chips (any types are fine).
4.Observe: the map updates and shows only the selected types.
5.Switch to another tab (e.g., Contributions / Explore).
6.Switch back to Nearby.
7.Observe: the chips are still selected, and now the map shows selected pins

Screenshots (for UI changes only)

Before:

After repair：

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[nicolas-raoul]

Testing this now, it seems to be working great.
I will test a bit more tomorrow. :-)