fix: show add LOI button when zoomed out

[arpitagarwal1301]

Fixes #3553

• Keep the Add LOI FAB available regardless of map zoom level.
• Preserve zoom-dependent LOI viewport filtering and map clustering behavior.
• Add focused coverage for the below-clustering-threshold case.

Verification

• ./gradlew checkCode
• ./gradlew :app:ktfmtCheck :app:testLocalDebugUnitTest --tests 'org.groundplatform.android.ui.home.mapcontainer.HomeScreenMapContainerViewModelTest'
• git diff --check

Limitations

• The behavior was not visually exercised on a device; the affected ViewModel state is covered by Robolectric.

[andreia-ferreira]

optional: can be slightly simplified with

Suggested change

	if (survey == null) listOf()
	else survey.jobs.filter { it.canDataCollectorsAddLois && it.getAddLoiTask() != null }
	survey?.jobs?.filter { it.canDataCollectorsAddLois && it.getAddLoiTask() != null } ?: listOf()

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.46%. Comparing base (44bcd71) to head (60a872a).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3858      +/-   ##
============================================
+ Coverage     67.37%   67.46%   +0.09%     
- Complexity     1838     1842       +4     
============================================
  Files           407      407              
  Lines         10755    10755              
  Branches       1418     1415       -3     
============================================
+ Hits           7246     7256      +10     
+ Misses         2763     2762       -1     
+ Partials        746      737       -9     

Files with missing lines	Coverage Δ
...me/mapcontainer/HomeScreenMapContainerViewModel.kt	71.79% <100.00%> (+1.92%)	⬆️

... and 4 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.