Listen for the correct data update intent.

This is one of the reasons we weren't getting widget updates.

Change-Id: I3b21b26ac84d6ab8cecf0d213eb3d4619980269f
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 11ee7e9..cc65400 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -142,7 +142,7 @@
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
             </intent-filter>
             <intent-filter>
-                <action android:name="com.google.android.gm.intent.ACTION_NOTIFY_DATASET_CHANGED" />
+                <action android:name="com.android.mail.ACTION_NOTIFY_DATASET_CHANGED" />
             </intent-filter>
             <meta-data android:name="android.appwidget.provider"
                        android:resource="@xml/widget_info" />