[Hack Week] ApiFaker: display a hint on the main app UI when the ApiFaker is enabled

[hichamboushaba]

Description

As part of my Hack Week, I'm bringing back the ApiFaker project paqN3M-SI-p2, and I'm splitting the feature into multiple PRs.

This PR adds a UI bottom banner to the main app when the ApiFaker is enabled, and the banner allows an easy path to disabling the ApiFaker.

I added unit-tests-exemption label because the class ApiFakerUiHelper has UI logic and can't be unit tested.

Steps to reproduce

1. Use a debug build.
2. Open the app settings.
3. Tap on Developer Options.
4. Tap on ApiFaker.
5. Add some fake endpoints definitions.
6. Enable the ApiFaker.

Testing information

• Confirm that when enabled, a bottom banner is shown on all app Activities (Login, MainActivity, Settings)
• Confirm that tapping on the banner shows a dialog that allows disabling the ApiFaker.

The tests that have been performed

^

Images/gif

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on big (tablet) and small (phone) in case of UI changes, and no regressions are added.

[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 ApiFakerUiHelper is missing tests, but unit-tests-exemption label was set to ignore this.
⚠️	Class QueryParameterConverter 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-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	60ba59a
	Direct Download	woocommerce-wear-prototype-build-pr13076-60ba59a.apk

[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
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	60ba59a
	Direct Download	woocommerce-prototype-build-pr13076-60ba59a.apk

[hafizrahman]

Followed the test instruction and banner appeared correctly and dialog also worked 👍🏼

Code looks good too.