[Woo POS] Improve Checkout view adaptability to large font sizes

[staskus]

Closes: #15123

Before tackling #15152, I'm updating the view to better support larger accessibility sizes

Description

The idea was to play with layoutPriority. However, it only works up to the point, we need to give permission for views to shrink, either by making resizable images (.resizable) or resizable texts (.minimumScaleFactor). Also, TotalsView texts are large enough for non-scroll view, so I decided to limit the size with dynamicTypeSizerange.

Changes:

• Updated POSFontStyleto support dynamicTypeSizerange, replaced existing UIContentSizeusage
• Updated payment state views to either hide images or shrink images when accessibility increased
• Updated priorities and limited text growth within `TotalsView``

Steps to reproduce

I suggest testing with:

• Common size device - iPad Air / Pro
• Small size device - iPad Mini

Test these checkout states with different accessibility sizes:

• Waiting for reader
• Waiting to tap/swipe card
• Order preparation errors
• Payment success

Testing information

Tested with iPad Air M2 and iPad Mini A17

Screenshots

iPad.mini.A17.Pro.Accessibility.mp4

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• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

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[wpmobilebot]

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

	App Name	WooCommerce iOS
	Build Number	pr15153-800dfb6
	Version	21.7
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	800dfb6
	App Center Build	WooCommerce - Prototype Builds #12974

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[iamgabrielma]

Looks great! Experience is much better now for larger accessibility sizes 🚢

Updated payment state views to either hide images or shrink images when accessibility increased

Yes, IMHO this is something we don't do often enough 👏

I've logged several accessibility-related issues I've found while testing, but unrelated to your changes:

#15161
#15162
#15163

[iamgabrielma]

Should we use something like String.localizedStringWithFormat( ... ) here rather than string concatenation? For localization in case of sites/app settings running RTL languages

[staskus]

Good question. It also depends how we want to present this part. On Android, only "Learn more" is presented in primary color while on iOS we show these two sentences from a new line. Either way, "Learn more" looks to be designed to be shown in a new sentence.