Push delete notification when Bug reports are deleted.

Bug: 28768706
Change-Id: I6d3e91fe7d12be44918f97cef12c99d936401270
diff --git a/packages/Shell/src/com/android/shell/BugreportStorageProvider.java b/packages/Shell/src/com/android/shell/BugreportStorageProvider.java
index 8b07599..9fd80d3 100644
--- a/packages/Shell/src/com/android/shell/BugreportStorageProvider.java
+++ b/packages/Shell/src/com/android/shell/BugreportStorageProvider.java
@@ -132,6 +132,7 @@
         if (!getFileForDocId(documentId).delete()) {
             throw new FileNotFoundException("Failed to delete: " + documentId);
         }
+        getContext().getContentResolver().notifyChange(getNotificationUri(), null);
     }
 
     // This is used by BugreportProgressService so that the notification uri shared by