I need usage access permission phrase for packages.xml (6.0.1) please help

I'm trying to give an app usage access but I can't do it in the settings menu. I need usage access permission phrase for packages.xml.
is it one of the following?
REAL_GET_TASKS
GET_TASKS
APPINDEXING
GET_APP_OPS_STATS
PACKAGE_USAGE_STATS
USER_ACTIVITY
UPDATE_APP_OPS_STATS
please help. Thanks

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