Update StorageSummaryDonutPreference content

- Set its view as unclickable
- Add content discription on DountView

Fixes: 78172416
Fixes: 78170302
Test: manual open talkback to check voice content
Change-Id: Ic40f88fb27344822bbb14cf62a79d8e030ee16ac

src/com/android/settings/deviceinfo/storage/StorageSummaryDonutPreference.java

@@ -71,6 +71,8 @@ public class StorageSummaryDonutPreference extends Preference implements View.On
     @Override
     public void onBindViewHolder(PreferenceViewHolder view) {
         super.onBindViewHolder(view);
+        view.itemView.setClickable(false);
+
         final DonutView donut = (DonutView) view.findViewById(R.id.donut);
         if (donut != null) {
             donut.setPercentage(mPercent);