Update the layout of AppDataUsagePreference

The layout of AppDataUsagePreference including a progressbar, that's not common pattern in SettingsLib.

Bug: 365506467
Bug: 370456736
Change-Id: I28d25724067d85f8d37c3b5273d38055ba7021a6
Test: atest
Flag: EXEMPT bugfix
diff --git a/src/com/android/settings/datausage/AppDataUsagePreference.java b/src/com/android/settings/datausage/AppDataUsagePreference.java
index d8c7392..277c9b3 100644
--- a/src/com/android/settings/datausage/AppDataUsagePreference.java
+++ b/src/com/android/settings/datausage/AppDataUsagePreference.java
@@ -38,6 +38,7 @@
     public AppDataUsagePreference(Context context, AppItem item, int percent,
             UidDetailProvider provider) {
         super(context);
+        setLayoutResource(R.layout.preference_process_stats);
         setKey("app_data_usage_" + item.key);
         mItem = item;
         mPercent = percent;
diff --git a/tests/robotests/src/com/android/settings/datausage/AppDataUsagePreferenceTest.java b/tests/robotests/src/com/android/settings/datausage/AppDataUsagePreferenceTest.java
index 7e6d314..f621cbf 100644
--- a/tests/robotests/src/com/android/settings/datausage/AppDataUsagePreferenceTest.java
+++ b/tests/robotests/src/com/android/settings/datausage/AppDataUsagePreferenceTest.java
@@ -91,7 +91,7 @@
         mPreference = new AppDataUsagePreference(RuntimeEnvironment.application, mAppItem,
                 50 /* percent */, mUidDetailProvider);
         final View view = LayoutInflater.from(RuntimeEnvironment.application).inflate(
-                com.android.settingslib.widget.preference.app.R.layout.preference_app, null);
+                com.android.settings.R.layout.preference_process_stats, null);
         final PreferenceViewHolder preferenceViewHolder =
                 PreferenceViewHolder.createInstanceForTests(view);
         final ProgressBar progressBar = (ProgressBar) preferenceViewHolder.findViewById(