Docs: Add back the dropped req for CHANGE_PHONE_ACCOUNTS intent

- The newly added req for CHANGE_PHONE_ACCOUNTS intent was dropped upon
gerrit merge. There were two additional reqs in the same section - one
req was merged successfully and this was dropped.

Bug: 70285069
Test: NA
Change-Id: Ie07114ab62070e0cbc91ce572bf624af1d4e8c92
1 file changed