[Sound panel] Update Ui layout to match with mertial next

please check bug for before/after screenshot.

Bug: 191317779
Test: verified on device
Change-Id: Ia570dde71ce9f18376eaba48102cecde6adb85bb

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

@@ -16,7 +16,8 @@
 
 package com.android.settings.panel;
 
-import static com.android.settings.slices.CustomSliceRegistry.MEDIA_OUTPUT_INDICATOR_SLICE_URI;
+import static android.app.slice.Slice.HINT_ERROR;
+import static android.app.slice.SliceItem.FORMAT_SLICE;
 
 import android.app.settings.SettingsEnums;
 import android.content.Context;
@@ -31,6 +32,7 @@ import androidx.annotation.VisibleForTesting;
 import androidx.lifecycle.LiveData;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.slice.Slice;
+import androidx.slice.SliceItem;
 import androidx.slice.widget.SliceView;
 
 import com.android.settings.R;
@@ -113,8 +115,6 @@ public class PanelSlicesAdapter
     public class SliceRowViewHolder extends RecyclerView.ViewHolder
             implements DividerItemDecoration.DividedViewHolder {
 
-        private boolean mDividerAllowedAbove = true;
-
         @VisibleForTesting
         final SliceView sliceView;
         @VisibleForTesting
@@ -137,8 +137,10 @@ 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)) {
-                mDividerAllowedAbove = false;
+
+            // Hides slice which reports with error hint or not contain any slice sub-item.
+            if (slice == null || !isValidSlice(slice)) {
+                sliceView.setVisibility(View.GONE);
             }
 
             // Log Panel interaction
@@ -156,14 +158,26 @@ public class PanelSlicesAdapter
             );
         }
 
+        private boolean isValidSlice(Slice slice) {
+            if (slice.getHints().contains(HINT_ERROR)) {
+                return false;
+            }
+            for (SliceItem item : slice.getItems()) {
+                if (item.getFormat().equals(FORMAT_SLICE)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
         @Override
         public boolean isDividerAllowedAbove() {
-            return mDividerAllowedAbove;
+            return false;
         }
 
         @Override
         public boolean isDividerAllowedBelow() {
-            return true;
+            return false;
         }
     }
 }