Update existingLoiFeatures to depend on camera bounds

[andreia-ferreira]

Towards #3866

This PR improves the previously introduced existingLoiFeatures, combining it with the getCurrentCameraPosition flow in order to only render the features within the bounds. This prevents potential OOMs due to the fact that these features, drawn in the drop pin/draw area screens, are not clusterable, so they'd all be rendered at once if not bounded.

It also removes the uneeded extension launchWhenTaskVisible which was required for when the data collection was a view pager.

@shobhitagarwal1612 PTAL?

[codecov]

Codecov Report

❌ Patch coverage is 62.06897% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.80%. Comparing base (1bd6c53) to head (ec97a16).

Files with missing lines	Patch %	Lines
...ui/datacollection/tasks/AbstractTaskMapFragment.kt	0.00%	4 Missing ⚠️
...ollection/tasks/polygon/DrawAreaTaskMapFragment.kt	72.72%	3 Missing ⚠️
...n/tasks/location/CaptureLocationTaskMapFragment.kt	0.00%	2 Missing ⚠️
...oundplatform/android/ui/common/BaseMapViewModel.kt	90.90%	0 Missing and 1 partial ⚠️
...tacollection/tasks/point/DropPinTaskMapFragment.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3887   +/-   ##
=========================================
  Coverage     68.79%   68.80%           
- Complexity     1928     1929    +1     
=========================================
  Files           412      411    -1     
  Lines         10971    10958   -13     
  Branches       1432     1428    -4     
=========================================
- Hits           7548     7540    -8     
+ Misses         2676     2673    -3     
+ Partials        747      745    -2     

Files with missing lines	Coverage Δ
...droid/ui/datacollection/DataCollectionViewModel.kt	80.93% <ø> (-0.24%)	⬇️
...oundplatform/android/ui/common/BaseMapViewModel.kt	63.49% <90.90%> (-0.58%)	⬇️
...tacollection/tasks/point/DropPinTaskMapFragment.kt	14.28% <0.00%> (+0.95%)	⬆️
...n/tasks/location/CaptureLocationTaskMapFragment.kt	0.00% <0.00%> (ø)
...ollection/tasks/polygon/DrawAreaTaskMapFragment.kt	50.00% <72.72%> (+2.17%)	⬆️
...ui/datacollection/tasks/AbstractTaskMapFragment.kt	60.27% <0.00%> (ø)

... and 2 files with indirect coverage changes

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