[POS] Update text color of card-present payment message views

[samiuelson]

Update of text color in card-present payment message views

WOOMOB-270

Description

This PR updates the text color in POS -> Checkout -> Card reader status title (e.g. "Getting ready", "Ready for payment") according to the updated design (FnDpCHVQ3Zpefad04ptbd4-fi-815_13464).

💡 The original issue contains also:

• Update the cart item removal icon from X to Trash
• Add chevron to Variable Products

Those points, however, have already been implemented.

Steps to reproduce

N/A

Testing information

Test POS Checkout screen in both dark and light modes.

Screenshots

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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.

[wpmobilebot]

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

	App Name	WooCommerce iOS Prototype
	Build Number	pr15929-58c5bcf
	Version	22.8
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	58c5bcf
	Installation URL	4rdeufb4ldk68

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

[staskus]

Looks good, checked the light and dark mode. Thanks for the update! 👍