Launching touchpad tutorial as user 0

It's required to properly intercept touchpad gestures which is happening
in process of user 0. By default activity was launched in the current
user process.
Also targeting sysui package directly with intent.

Bug: 361518125
Test: launch touchpad tutorial with HSUM and see touchpad gestures intercepted
Flag: com.android.systemui.shared.new_touchpad_gestures_tutorial
Change-Id: I904df93758e49a7b10cf6d7a5398550405daafbb