Update height of SliceView

So it can display 6 items at most, not 4 items

Bug: 120803703
Test: Manual
Change-Id: Id34398903d0f81bebee3e02c024d21ad2e68578f

src/com/android/settings/slices/SlicePreferenceController.java

@@ -50,7 +50,6 @@ public class SlicePreferenceController extends BasePreferenceController implemen
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-
         mSlicePreference = screen.findPreference(getPreferenceKey());
     }