Contact Info Block: Not shown in "add block" bottom sheet

[thehenrybyrd]

Describe the bug
While I can view and edit a Contact Info Block added from the web, it's not possible to add one from the WP app (either iOS or Android) because the Contact Info Block doesn't appear in the block list when I tap the "+" icon.

To Reproduce
Steps to reproduce the behavior:

1. On a WordPress.com site or a self-hosted site with Jetpack version > 8.5, open a post or page.
2. Tap the "+" icon to add a new block.
3. Scroll down the list to find the "Contact Info" block.
4. Note that it is not listed.

Expected behavior
I expected the Contact Info Block to appear in this list, probably next to the recently added Story block.

Screenshots

iOS:

Android:

Smartphone
Samsung Galaxy S21, Android 11, WPAndroid 17.2-rc-1
iPhone SE, iOS 14.4.2, WPiOS 17.2

cc: @illusaen looks like you've worked on this feature recently in #3340

[zwarm]

@fyi: Looks like feature flag is off for Android production builds:
buildConfigField "boolean", "CONTACT_INFO_BLOCK_AVAILABLE", "false"

[hypest]

Fixed with wordpress-mobile/WordPress-Android#14499 and wordpress-mobile/WordPress-iOS#16347.