As per above, I applied the adgrants.sql script which accompanied the patch at the dbTier just before running adop to apply 1917270. I also placed the file specifically where it said to do so in $ORACLE_HOME/appsutil/admin.
The adop session fails with:
Please apply adgrants.sql file in database tier before applying this patch. I'm installing the most recent Vision environment, and the staging area was patched as recommended.
There does not seem to be a related support or community note.