• Gutenberg PR: [RNMobile] Bump Aztec-Android to v1.5.1 WordPress/gutenberg#36861
• WordPress-Android PR: Bump Aztec version to v1.5.1 WordPress-Android#15618

Fixes #3136

This fix was made in Aztec-Android (reference), so the Gutenberg reference points to a commit where the version of Aztec-Android has been bumped to the newer version v1.5.1.

To test:

1. Run the command npm run core android to build the demo app.
2. Add a a rich-text based component with content (Paragraph, Heading, Quote, Media Caption, etc...).
3. Write a word and select it.
4. Press the link format button.
5. Fill the options and dismiss to add a link.
6. Select the word.
7. Press the bold, italic or strikethrough button to apply text format.
8. Press the Undo button multiple times until all changes are reverted.
9. Observe that the undo functionality works as expected and that doesn't get blocked as described in Undo/redo - Apply text format to a link breaks the undo functionality Undo/redo - Apply text format to a link breaks the undo functionality #3136.

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered if this change warrants user-facing release notes more info and have added them to RELEASE-NOTES.txt if necessary.