Fix bug 2250432 - all apps should dismiss when you power off or phone locks

Also cherry-picks this from launcher 1

Fix issue #2133206: dialogs/menus should auto-dismiss when screen turns off

Close things out in various ways.  This should be done for Launcher2 as well.

Change-Id: Id4f1c78e35180b437144c54ddcbf10069cc09071

Conflicts:

	AndroidManifest.xml
	src/com/android/launcher2/Launcher.java
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index bd9a4de..af66610 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -84,7 +84,8 @@
             android:name="WallpaperChooser"
             android:label="@string/pick_wallpaper"
             android:icon="@drawable/ic_launcher_wallpaper"
-            android:screenOrientation="nosensor">
+            android:screenOrientation="nosensor"
+            android:finishOnCloseSystemDialogs="true">
             <intent-filter>
                 <action android:name="android.intent.action.SET_WALLPAPER" />
                 <category android:name="android.intent.category.DEFAULT" />