Enable VideoPress block on iOS

[fluiddot]

Related PRs:

• [Gutenberg] Enable VideoPress block WordPress-iOS#20580

This PR enables the VideoPress block on iOS as it will released first on that platform. In the next few days, we plan to ship the Android version.

NOTE: ⚠️ The VideoPress block only works on Simple WPCOM sites.

To test

iOS

1. Open the app and connect it with the local Metro server.
2. Open/create a post.
3. Tap ➕ button to open the block inserter.
4. Observe that the VideoPress block is displayed.
5. Tap on the VideoPress block to add it.
6. Add a video.
7. Observe that the video is displayed and can be played.

Example:

Android

1. Follow the steps from the iOS test case.
2. Observe that the VideoPress block is displayed while in dev mode.
3. Tap on the three dots button -> Debug Menu -> Settings.
4. Disable JS Dev Mode.
5. Reload the editor by tapping on the three dots button -> Reload.
6. Observe that the VideoPress block is displayed as unsupported.
7. Tap ➕ button to open the block inserter.
8. Observe that the VideoPress block is NOT displayed.

NOTE: Repeat steps 3 and 4 (enable JS Dev Mode) to go back to dev mode.

Example:

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.

[peril-wordpress-mobile]

Wanna run full suite of Android and iOS UI tests? Click here and 'Approve' CI job!

[fluiddot]

I bumped the Jetpack ref to incorporate the changes from Automattic/jetpack#30071. Note that it's not pointing to the latest commit from trunk.

[SiobhyB]

LGTM! I left one small question/comment about the release notes, but nothing at all blocking, going ahead to approve :D 😎