Tutorial correctly handling META key event

Removing previous workaround where ALT key was needed to be pressed.
Also fixing the bug when you have to press non-modifier button first and only after that modifier key is intercepted by our view.

Bug: 358587037
Flag: com.android.systemui.shared.new_touchpad_gestures_tutorial
Test: open keyboard tutorial and use Meta/Action key to finish it!
Change-Id: Ifc4e989b54650bd0ee239b48c248fde90c76a3c6