Add locusId as something taskOrganizers care about

This ensures that a locusId change will trigger an
onTaskInfoChange immediately. Previously it would just
be sent with the next info change event which isn't
sufficient.

Test: atest NotificationManagerTest
Bug: 204260661
Change-Id: I2b53f63b6efd6d2c22a877b7c33f5a12832a8e1d