Renaming intent to better reflect what tutorial is launched

Previously we assumed it would be only touchpad tutorial but now we want to make it touchpad + keyboard.
TouchpadTutorialActivity is not renamend on purpose because:
1. it's not public API and can be easily renamed
2. there will be likely different activities - one for OOBE flow and one for settings entry - and of them will be touchpad-only

Bug: 309928033
Test: launch activity with intent
Flag: com.android.systemui.shared.new_touchpad_gestures_tutorial
Change-Id: I570c90b470afeee64d5dd140eb0a7e2ba0f36627