Defined in fuchsia.ui.activity.control/control.fidl
The Control protocol can be used to override the activity state of the Activity Service (fuchsia.ui.activity).
State provided through this interface takes precedence over state which is determined based on activity sent through the Tracker API.
Once a state has been assigned through this protocol, the Activity Service will no longer determine state based on input to the fuchsia.ui.activity.Tracker protocol, and instead will only report state transitions occuring through the Control protocol.
Sets the Activity Service's state to |state|. All listeners registered through the Provider protocol will immediately be notified of the new state.
Typically, state transitions should occur minutes apart (e.g. transition from ACTIVE to IDLE after 15 minutes of inactivity).