Fix volume slider color is not correct

Fixes: 140990940
Test: 1. Switch to dark theme
      2. adb shell am start -a android.settings.panel.action.VOLUME
      3. check volume slider color is identical to color in "Done"
      4. Switch to light theme
      5. adb shell am start -a android.settings.panel.action.VOLUME
      6. Check volume slider color is identical to color in "Done"

Change-Id: If783d5c5f8604a23cfaaa28cf42b916763f9c9e8

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

@@ -75,6 +75,8 @@ public class SliceBuilderUtils {
      * {@param sliceData} is an inline controller.
      */
     public static Slice buildSlice(Context context, SliceData sliceData) {
+        // Reload theme for switching dark mode on/off
+        context.getTheme().applyStyle(R.style.Theme_Settings_Home, true /* force */);
         Log.d(TAG, "Creating slice for: " + sliceData.getPreferenceController());
         final BasePreferenceController controller = getPreferenceController(context, sliceData);
         FeatureFactory.getFactory(context).getMetricsFeatureProvider()