[Gutenberg] - Gallery block - Fix getMediaItems

[geriux]

Related PRs:

• Gallery block - Fix getMediaItems  gutenberg-mobile#6978
• [Mobile] - Gallery block - Fix getMediaItems WordPress/gutenberg#63426
• [Gutenberg] - Gallery block - Fix getMediaItems  WordPress-Android#21053

Fixes an issue with the Gallery block displaying an invalid type error when adding images.

To Test:

Check the Gutenberg PR description.

Regression Notes

1. Potential unintended areas of impact

It affects only the editor.

2. What I did to test those areas of impact (or what existing automated tests I relied on)

Manual testing.

3. What automated tests I added (or what prevented me from doing so)

No new tests were added.

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[wpmobilebot]

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

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr23417-2fbdf50
	Version	25.1
	Bundle ID	org.wordpress.alpha
	Commit	2fbdf50
	App Center Build	WPiOS - One-Offs #10285

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

[wpmobilebot]

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

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr23417-2fbdf50
	Version	25.1
	Bundle ID	com.jetpack.alpha
	Commit	2fbdf50
	App Center Build	jetpack-installable-builds #9332

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

[dcalhoun]

Approved via WordPress/gutenberg#63426 (review).