Add storage_summary_donut above ProfileSelectStorageFragment

- Modify ProfileSelectFragment to support add preference xml in the
top, and tabLayout below the preferences. Base preference layout is
dummy_preference_screen.xml which contains no preference.
ProfileSelectStorageFragment contains StorageSummaryDonutPreference
above the tabLayout.
- Make StorageSummaryDonutPreferenceController self workable without
StorageDashboardFragment dependence.
- Rename inactive_apps.xml to dummy_preference_screen.xml
- Move ShadowPrivateStorageInfo from LowStorageSliceTest

Bug: 141601408
Test: manual
Change-Id: Ide12840dc81bb104f328e230ecda5d35bba01d7a

res/xml/dummy_preference_screen.xml

@@ -15,8 +15,7 @@
 -->
 
 <PreferenceScreen
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:title="@string/inactive_apps_title">
-
+    xmlns:settings="http://schemas.android.com/apk/res-auto"
+    settings:searchable="false">
 </PreferenceScreen>
 

res/xml/storage_dashboard_fragment.xml

@@ -22,7 +22,9 @@
     android:orderingFromXml="false">
     <com.android.settings.deviceinfo.storage.StorageSummaryDonutPreference
         android:key="pref_summary"
-        android:order="0" />
+        android:order="0"
+        settings:searchable="false"
+        settings:controller="com.android.settings.deviceinfo.storage.StorageSummaryDonutPreferenceController"/>
     <com.android.settings.widget.MasterSwitchPreference
         android:fragment="com.android.settings.deletionhelper.AutomaticStorageManagerSettings"
         android:key="toggle_asm"

res/xml/storage_summary_donut.xml

@@ -0,0 +1,28 @@
+<!--
+  ~ Copyright (C) 2019 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:settings="http://schemas.android.com/apk/res-auto"
+    android:key="storage_dashboard_screen"
+    android:title="@string/storage_settings"
+    android:orderingFromXml="false">
+    <com.android.settings.deviceinfo.storage.StorageSummaryDonutPreference
+        android:key="pref_summary"
+        android:order="0"
+        settings:searchable="false"
+        settings:controller="com.android.settings.deviceinfo.storage.StorageSummaryDonutPreferenceController"/>
+</PreferenceScreen>