Fix media switch slice doesn't display in panel

Fixes: 140396725
Test: manual
Change-Id: Idf0b766ce5f4316ff90a23faf3083cdee9854562

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

@@ -117,7 +117,7 @@ public class PanelSlicesAdapter
 
             // Do not show the divider above media devices switcher slice per request
             final Slice slice = sliceLiveData.getValue();
-            if (slice != null && slice.getUri().equals(MEDIA_OUTPUT_INDICATOR_SLICE_URI)) {
+            if (slice == null || slice.getUri().equals(MEDIA_OUTPUT_INDICATOR_SLICE_URI)) {
                 mDividerAllowedAbove = false;
             }