Completed downloads should clear when touched.

Bug: 8744610
Change-Id: I135a3acbc819fd725f00ba57461e21db1fe24850
diff --git a/src/com/android/providers/downloads/DownloadNotifier.java b/src/com/android/providers/downloads/DownloadNotifier.java
index 0405478..ac52eba 100644
--- a/src/com/android/providers/downloads/DownloadNotifier.java
+++ b/src/com/android/providers/downloads/DownloadNotifier.java
@@ -175,6 +175,7 @@
                 final DownloadInfo info = cluster.iterator().next();
                 final Uri uri = ContentUris.withAppendedId(
                         Downloads.Impl.ALL_DOWNLOADS_CONTENT_URI, info.mId);
+                builder.setAutoCancel(true);
 
                 final String action;
                 if (Downloads.Impl.isStatusError(info.mStatus)) {