Only send broadcasts to registered receivers

Fix for issue found in #7420259

Not sure if this fixes the actual ringtone issue, but it clears the way.

Change-Id: I7fd5584df2dc254ba7281f57e51143c79bfcff63

Author: Amith Yamasani

core/java/android/server/search/SearchManagerService.java

@@ -74,7 +74,7 @@ public SearchManagerService(Context context)  {
         mContext = context;
         mContext.registerReceiver(new BootCompletedReceiver(),
                 new IntentFilter(Intent.ACTION_BOOT_COMPLETED));
-        mContext.registerReceiver(new UserReceiver(), 
+        mContext.registerReceiver(new UserReceiver(),
                 new IntentFilter(Intent.ACTION_USER_REMOVED));
         new MyPackageMonitor().register(context, null, UserHandle.ALL, true);
     }
@@ -161,7 +161,8 @@ private void updateSearchables() {
             }
             // Inform all listeners that the list of searchables has been updated.
             Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
-            intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
+            intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING
+                    | Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
             mContext.sendBroadcastAsUser(intent, new UserHandle(changingUserId));
         }
     }