Update preferenceSlice layout rule for new volume panel design

-show icon at left side of Slice if the mapping preference contains icon
-align MediaOutputIndicatorSlice layout with other volume slice

Bug: 148821795
Test: make -j42 RunSettingsRoboTests
Change-Id: I5b0cf7f32f355503942cb62ccf36f77ceeb1b30d

src/com/android/settings/media/MediaOutputIndicatorSlice.java

@@ -23,6 +23,7 @@ import android.app.PendingIntent;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.content.Intent;
+import android.graphics.Bitmap;
 import android.net.Uri;
 import android.util.Log;
 
@@ -77,18 +78,24 @@ public class MediaOutputIndicatorSlice implements CustomSliceable {
         final SliceAction primarySliceAction = SliceAction.createDeeplink(
                 primaryActionIntent, icon, ListBuilder.ICON_IMAGE, title);
         @ColorInt final int color = Utils.getColorAccentDefaultColor(mContext);
-
+        // To set an empty icon to indent the row
         final ListBuilder listBuilder = new ListBuilder(mContext,
                 MEDIA_OUTPUT_INDICATOR_SLICE_URI,
                 ListBuilder.INFINITY)
                 .setAccentColor(color)
                 .addRow(new ListBuilder.RowBuilder()
                         .setTitle(title)
+                        .setTitleItem(createEmptyIcon(), ListBuilder.ICON_IMAGE)
                         .setSubtitle(findActiveDeviceName())
                         .setPrimaryAction(primarySliceAction));
         return listBuilder.build();
     }
 
+    private IconCompat createEmptyIcon() {
+        final Bitmap bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888);
+        return IconCompat.createWithBitmap(bitmap);
+    }
+
     private Intent getMediaOutputSliceIntent() {
         final Intent intent = new Intent()
                 .setAction(MediaOutputSliceConstants.ACTION_MEDIA_OUTPUT)

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

@@ -286,7 +286,7 @@ public class SliceBuilderUtils {
         final PendingIntent actionIntent = getSliderAction(context, sliceData);
         final PendingIntent contentIntent = getContentPendingIntent(context, sliceData);
         final IconCompat icon = getSafeIcon(context, sliceData);
-        @ColorInt final int color = Utils.getColorAccentDefaultColor(context);
+        @ColorInt int color = Utils.getColorAccentDefaultColor(context);
         final CharSequence subtitleText = getSubtitleText(context, controller, sliceData);
         final SliceAction primaryAction = SliceAction.createDeeplink(contentIntent, icon,
                 ListBuilder.ICON_IMAGE, sliceData.getTitle());
@@ -299,17 +299,22 @@ public class SliceBuilderUtils {
         if (cur > sliderController.getMax()) {
             cur = sliderController.getMax();
         }
-
-        return new ListBuilder(context, sliceData.getUri(), ListBuilder.INFINITY)
-                .setAccentColor(color)
-                .addInputRange(new InputRangeBuilder()
+        final InputRangeBuilder inputRangeBuilder = new InputRangeBuilder()
                 .setTitle(sliceData.getTitle())
                 .setSubtitle(subtitleText)
                 .setPrimaryAction(primaryAction)
                 .setMax(sliderController.getMax())
                 .setMin(sliderController.getMin())
                 .setValue(cur)
-                        .setInputAction(actionIntent))
+                .setInputAction(actionIntent);
+        if (sliceData.getIconResource() != 0) {
+            inputRangeBuilder.setTitleItem(icon, ListBuilder.ICON_IMAGE);
+            color = CustomSliceable.COLOR_NOT_TINTED;
+        }
+
+        return new ListBuilder(context, sliceData.getUri(), ListBuilder.INFINITY)
+                .setAccentColor(color)
+                .addInputRange(inputRangeBuilder)
                 .setKeywords(keywords)
                 .build();
     }