Update suggested wallpaper dimensions in onResume

If another launcher runs in between, it might
change the suggested dimensions. This fixes that
case.

Bug: 11667475
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 901b638..1e418ec 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -160,6 +160,13 @@
             </intent-filter>
         </receiver>
 
+        <receiver
+            android:name="com.android.launcher3.WallpaperChangedReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.WALLPAPER_CHANGED" />
+            </intent-filter>
+        </receiver>
+
         <!-- Intent received used to install shortcuts from other applications -->
         <receiver
             android:name="com.android.launcher3.InstallShortcutReceiver"