Blaze: Ad target languages

[0nko]

Adresses #10589. The PR implements the target language selection in the ad preview screen.

Screen_recording_20240127_150953.webm

To test:

1. Start the Blaze campaign creation
2. Select a product
3. Tap on the Languages option
4. Notice a language selection screen opens
5. Select some languages
6. Tap on the Save button
7. Notice the selected languages are displayed in the preview

Note: Please merge #10638 before merging this.

[dangermattic]

	3 Warnings
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.
⚠️	Class BlazeCampaignTargetSelectionViewModel is missing tests, but unit-tests-exemption label was set to ignore this.
⚠️	Class BlazeTargetType is missing tests, but unit-tests-exemption label was set to ignore this.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Flavor	Jalapeno
	Build Type	Debug
	Commit	ec280ac
	Direct Download	woocommerce-prototype-build-pr10641-ec280ac.apk

[codecov-commenter]

Codecov Report

Attention: 69 lines in your changes are missing coverage. Please review.

Comparison is base (60a330a) 41.41% compared to head (ec280ac) 41.37%.
Report is 30 commits behind head on trunk.

Files	Patch %	Lines
...n/targets/BlazeCampaignTargetSelectionViewModel.kt	0.00%	41 Missing ⚠️
...n/preview/BlazeCampaignCreationPreviewViewModel.kt	0.00%	21 Missing ⚠️
...droid/ui/blaze/creation/targets/BlazeTargetType.kt	0.00%	4 Missing ⚠️
...om/woocommerce/android/ui/blaze/BlazeRepository.kt	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk   #10641      +/-   ##
============================================
- Coverage     41.41%   41.37%   -0.05%     
  Complexity     4979     4979              
============================================
  Files          1007     1009       +2     
  Lines         57720    57780      +60     
  Branches       7678     7683       +5     
============================================
  Hits          23904    23904              
- Misses        31698    31758      +60     
  Partials       2118     2118              

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[JorgeMucientes]

Minor np, Wdyt about having a single flow for languages and add a new boolean field to the Language model to save the isSelected state. I feel with this approach of 2 different flows one for all the values and one for the selected ones we are going to have an explosion of flows once we add the rest of the campaign details.

[0nko]

Hm.. 🤔 I'm not convinced this would be cleaner, in the end. We'd save 4 flows overall but updating the selection and returning results would result in copying the entire lists and mapping, like this:

languages.update { items -> items.map { it.copy(isSelected = it.language.code in selectedIds) } } } instead of selectedLanguages.update { selectedIds }.

Let's discuss this further, I don't feel too strongly about this.. 🙂

[JorgeMucientes]

Great work @0nko, code looks good and works as expected. I left a minor suggestion, but there's no need to apply it in this PR or at all. So feel free to merge whenever you prefer.