[GAR] Set the attribute of SliceView is not important to skip for Accessibily

Bug: 179002330
Test: manual test
      make RunSettingsRoboTests ROBOTEST_FILTER=PanelSlicesAdapterTest
Change-Id: I67cdd04cd5655ab297d58d7f9ee20e5e0f6ea7fd

src/com/android/settings/panel/PanelSlicesAdapter.java

@@ -125,6 +125,7 @@ public class PanelSlicesAdapter
             sliceView = view.findViewById(R.id.slice_view);
             sliceView.setMode(SliceView.MODE_LARGE);
             sliceView.setShowTitleItems(true);
+            sliceView.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);
             mSliceSliderLayout = view.findViewById(R.id.slice_slider_layout);
         }