History: Initial revision is not recorded

Related:

• https://github.com/Automattic/wp-calypso/issues/64963
• https://github.com/wordpress-mobile/WordPress-iOS/issues/19150

Expected behavior

• The initial revision exists in the app and on the web
• The behavior matches the web

Actual behavior

• The initial revision is lost and only the second revision and after are recorded

Steps to reproduce the behavior

This test was conducted on a .com site.

1. Create a new post in the app, add content, and publish it or save it as a draft

• When tapping ... at the top right in the post, and tapping "History", nothing shows in the list
• On the web, the "Revisions" section for the post doesn't appear

2. Make changes to the post and tap Update

• When tapping ... at the top right, tapping "History" shows one item containing the changes from step 2
• On the web, the "Revisions" section for the post doesn't appear (it may currently hide the section if the count <= 1)

3. Make changes and tap Update

• When tapping ... at the top right, tapping "History" shows two items containing the changes from steps 2 and 3
• On the web, the "Revisions" section is available for the post and shows changes from steps 2 and 3

Tested on Pixel 4a, Android 12, WPAndroid 20.4

Reproduce the issue in the Android app using the History menu and the three-step post editing flow described in the report. Compare the initial save or publish with later updates and verify behavior against the web; done means the initial revision appears in the app and on the web, matching the expected behavior.