Update GB-mobile to release 1.25.0

[SergioEstevao]

Prepare the integration of Gutenberg release 1.25.0

To test:

• Test the functionality of the Gutenberg editor

PR submission checklist:

• I have considered adding unit tests where possible.
• 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.

[peril-wordpress-mobile]

You can test the changes on this Pull Request by downloading the APK here.

[peril-wordpress-mobile]

You can trigger optional UI/connected tests for these changes by visiting CircleCI here.

[etoledom]

Writing flow sanity tests:

• Undo-redo (steps)
  This is not a regression on this version (so probably not a blocker). Still happens on WPiOS v14.5.
• Copy-paste (steps)
• ❌ Splitting blocks (steps) Results here.
• ❌ Multiline components (steps) Results here
• ❌ Formatting on rich-text based components (steps) Results here
• Block insertion (steps)

[etoledom]

Splittings block tests failures:

TC002 Merge after deleting selection
Video
Following the steps, it breaks trying to merge again the blocks.

@SergioEstevao - This one might be a blocker.

TC004 Merge after deleting all
Video

• After deleting all text from the second block, the placeholder is not visible.
• Pressing backspace will show the placeholder.
• Pressing backspace again will finally merge the block.
• The cursor appears at the beginning of the block instead of at the end.

Probably not a blocker since it's not critical (just a bit ugly)

[etoledom]

Multiline components failure:

Caption component is not creating a new line at all.
This happens in Image, Vide, and Gallery blocks.

@SergioEstevao - This one looks like a pretty bad one too.

[etoledom]

Rich Text Formatting

TC007 Test format detection under the cursor

This is probably an old one. Gutenberg won't recognise just added strikethrough under the cursor since it uses <del> instead of <s> tags.

EDIT:
Interesting enough, there are times when the <s> tag is used. But when I try many formats together, it will start using <del>.

[etoledom]

Testing new features:

• New block: Cover
• Improve icon on the "Take a Video" media option
• Removed the dimming effect on unselected blocks
• Enabled edit button over image block for Android
• Implemented dropdown toolbar for alignment toolbar in Heading, Paragraph, Image, MediaText blocks
• When editing link settings, tapping the keyboard return button now closes the settings panel as well as closing the keyboard.

[etoledom]

None of the issues found are new for this release, so that's a ✅ for the writing flow tests.

[peril-wordpress-mobile]

	Warnings
⚠️	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

Messages

📖

This PR contains changes in the subtree libs/login/. It is your responsibility to ensure these changes are merged back into wordpress-mobile/WordPress-Login-Flow-Android. Follow these handy steps! WARNING: Make sure your git version is 2.19.x or lower - there is currently a bug in later versions that will corrupt the subtree history! cd WordPress-Android git checkout gutenberg/integrate_release_1.25.0 git subtree push --prefix=libs/login/ https://github.com/wordpress-mobile/WordPress-Login-Flow-Android.git merge/WordPress-Android/11572 Browse to https://github.com/wordpress-mobile/WordPress-Login-Flow-Android/pull/new/merge/WordPress-Android/11572 and open a new PR.

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[hypest]

LGTM!