Send change notifications for the default folder.

The notification URI wasn't being set
properly for queries on the default folder.

Bug: 3013098
Change-Id: I6418c5189b88888b3a588c7264b3f9f56ec95d78
diff --git a/src/com/android/browser/provider/BrowserProvider2.java b/src/com/android/browser/provider/BrowserProvider2.java
index b73927a..a7545d4 100644
--- a/src/com/android/browser/provider/BrowserProvider2.java
+++ b/src/com/android/browser/provider/BrowserProvider2.java
@@ -618,7 +618,12 @@
                             };
                 }
 
-                return db.rawQuery(query, args);
+                Cursor cursor = db.rawQuery(query, args);
+                if (cursor != null) {
+                    cursor.setNotificationUri(getContext().getContentResolver(),
+                            BrowserContract.AUTHORITY_URI);
+                }
+                return cursor;
             }
 
             case HISTORY_ID: {