Use current user to launch note task

It retrieves the system user using the UserTracker, so the NoteTask is associated with the current logged in user or system user if locked out (b/267634412).

Additionally, clean-up the code by removing the unnecessary optional parameters (b/269724992) and adds the missing flags for opening note task correctly (b/271280243).

Test: atest SystemUITests:NoteTaskControllerTest

Fixes: b/267634412
Fixes: b/269724992
Fixes: b/271280243

Change-Id: Id6e1261dac7855c35c6d4a00e362d84709816339