This is the final step of
https://linear.app/comm/issue/ENG-2072/maintain-the-spoiler-state-upon-opening-textmessagetooltipmodal,
where messages will retain their 'revealed' state when tapped to reveal
the tooltip. With this diff, spoilers for native should now be fully
functional, with two remaining tasks to just handle notifications and
message previews.
Depends on D5539