Improvements to manage apps / running services:

- Running services now keeps a single data structure to make
  switching through the UI a lot faster.
- Display text when there are no apps.
- Fix deadlock.
- Add new preference entry to view manage apps for storage use.
- Etc.

Change-Id: I0f5babf407ed7e84169f59584ddcb6cd0e9d67d9

res/layout/manage_applications.xml

@@ -4,9 +4,9 @@
      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.
@@ -18,12 +18,20 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent" >
 
-    <ListView 
-        xmlns:android="http://schemas.android.com/apk/res/android"
-        android:id="@android:id/list"
-        android:drawSelectorOnTop="false"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+    <FrameLayout android:id="@+id/list_container"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+        <ListView android:id="@android:id/list"
+            android:drawSelectorOnTop="false"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+        <TextView android:id="@android:id/empty"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:text="@string/no_applications"
+                android:textAppearance="?android:attr/textAppearanceLarge" />
+    </FrameLayout>
 
     <view class="com.android.settings.applications.RunningProcessesView"
             android:id="@+id/running_processes"

res/values/strings.xml

@@ -1687,7 +1687,8 @@
     <string name="filter_apps_onsdcard">On SD card</string>
     <!-- Manage applications, text telling using an application is disabled. -->
     <string name="disabled">Disabled</string>
-    <string name="loading">Loading\u2026</string>
+    <!-- Text shown when there are no applications to display. -->
+    <string name="no_applications">No applications.</string>
     <!-- Manage app screen, shown when the activity is busy recomputing the size of each app -->
     <string name="recompute_size">Recomputing size\u2026</string>
     <!-- Manage applications, individual application screen, confirmation dialog title. Displays when user selects to "Clear data". -->
@@ -1750,12 +1751,19 @@ found in the list of installed applications.</string>
     <!-- Manage applications. application installation location summary -->
     <string name="app_install_location_summary">Change the preferred installation location for new applications.</string>
 
+    <!-- Services settings screen, setting option name for the user to go to the screen to view app storage use -->
+    <string name="storageuse_settings_title">Storage use</string>
+    <!-- Services settings screen, setting option summary for the user to go to the screen to app storage use -->
+    <string name="storageuse_settings_summary">View storage used by applications</string>
+
     <!-- Services settings screen, setting option name for the user to go to the screen to view running services -->
     <string name="runningservices_settings_title">Running services</string>
     <!-- Services settings screen, setting option summary for the user to go to the screen to view running services  -->
     <string name="runningservices_settings_summary">View and control currently running services</string>
     <!-- Label for a service item when it is restarting -->
     <string name="service_restarting">Restarting</string>
+    <!-- Text shown when there are no services running -->
+    <string name="no_running_services">Nothing running.</string>
     <!-- Running services, description for a service in the started state -->
     <string name="service_started_by_app">Started by application.</string>
     <!-- Running services, description for a service in the started state -->

res/xml/application_settings.xml

@@ -59,6 +59,14 @@
                 android:targetClass="com.android.settings.RunningServices" />
     </PreferenceScreen>
 
+    <PreferenceScreen
+            android:title="@string/storageuse_settings_title"
+            android:summary="@string/storageuse_settings_summary">
+        <intent android:action="android.intent.action.MAIN"
+                android:targetPackage="com.android.settings"
+                android:targetClass="com.android.settings.applications.StorageUse" />
+    </PreferenceScreen>
+
     <PreferenceScreen
             android:key="power_usage"
             android:title="@string/power_usage_summary_title"