Add a new module API to update user presence state. (#16544)

This adds a module API which allows a module to update a user's
presence state/status message. This is useful for controlling presence
from an external system.

To fully control presence from the module the presence.enabled config
parameter gains a new state of "untracked" which disables internal tracking
of presence changes via user actions, etc. Only updates from the module will
be persisted and sent down sync properly).

1 files changed, 1 insertions, 0 deletions

diff --git a/changelog.d/16544.feature b/changelog.d/16544.feature
new file mode 100644
index 0000000000..92bf701be6
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+Add a new module API for controller presence.