Implement trackpad gestures education UI.

1. Use BottomSheetDialogFragment.
2. Use LottieAnimationView for animation
3. Add 5 animation assets

Demo: go/trackpad_education_demo

Bug: 247080509
Test: manual
Change-Id: Icac7a6cd51763ca20b7661d6f1d4cc95af5292e9

src/com/android/settings/inputmethod/TrackpadTouchGestureSettings.java

@@ -31,6 +31,7 @@ public class TrackpadTouchGestureSettings extends DashboardFragment {
     @Override
     public void onAttach(Context context) {
         super.onAttach(context);
+        use(TouchGesturesButtonPreferenceController.class).setFragment(this /*parent*/);
     }
 
     @Override