[Contextual Edu] Add PKT education stats interactor

- Provide method calls for updating data when shortcut/gesture triggered
- Add related kosmos classes

Test: KeyboardTouchpadStatsInteractorTest
Test: ContextualEducationRepositoryTest
Bug: 317496783
Flag: com.android.systemui.keyboard_touchpad_contextual_education
Change-Id: Ie91e01cb5a66bf0cb842713a8a8106505200e26b