Request fewer historical notifications.

Bug: 8280039
Change-Id: I1cf2f96d0f159f58fc61572e78ea33f1c49cfed9
diff --git a/src/com/android/settings/NotificationStation.java b/src/com/android/settings/NotificationStation.java
index ea0c8b6..057c50e 100644
--- a/src/com/android/settings/NotificationStation.java
+++ b/src/com/android/settings/NotificationStation.java
@@ -163,7 +163,7 @@
         final int currentUserId = ActivityManager.getCurrentUser();
         try {
             StatusBarNotification[] nions = mNoMan.getHistoricalNotifications(
-                    mContext.getPackageName(), 100);
+                    mContext.getPackageName(), 50);
             List<HistoricalNotificationInfo> list
                     = new ArrayList<HistoricalNotificationInfo>(nions.length);